Pumps again.. Frustrated. - Page 2

Beenalongtime79 · 01/31/2007, 02:59 PM

Get a chiller

ErikS · 01/31/2007, 03:07 PM

Always tough to keep a small tank cool. Lights, pumps, etc add heat.

Active cooling -

fans in the canopy, fan on the sump, the cooling you linked to - all should help.

Don't like powerheads?

Small return pump & closed loop powered by a small pump (about the same as powerheads in the tank)?

eugenesa · 01/31/2007, 10:17 PM

All right, now what do we know about noise levels of various powerheads? I just put Rio 600 in the tank, and the resulting hum (from tank and stand vibration) is way beyond my comfort level. How do these compare?

eugenesa · 01/31/2007, 10:20 PM

.. Also it would now be very interesting to try the Gorman Rupp 14110. It takes only 65W, and it runs very hot meaning there should be very little heat going into the water. Too bad I have sold mine shortly after I have got my PS2, not yet knowing about the heat problem...

eugenesa · 01/31/2007, 10:31 PM

> Get a chiller

I will. But I was hoping to only use it during Summer time, not through the whole year. I strongly suspect the chiller will be noisy (apparently, in this business every device generates either a lot of heat, or a lot of noise, or, often, both

)

Beenalongtime79 · 02/01/2007, 12:42 PM

Get the currentusa 1/10 hp chiller. If you think that thing produces too much noise, then you are too OCD to keep a reef tank.

I've got the same model and it is rock steady as well as quiet. I doubt it gets over 25 db.

It would handle your system with ease.

Peace,
John H.

eugenesa · 02/01/2007, 12:59 PM

Rufio, what are you using to pump water through the chiller, and at how much flow? My other concern was that the chiller would require its own loop, and I doubt that at 1/2" barb fitting it can be plugged into a 500 gph loop. (I just recently tried this with the in-line Hydor heater, it also had 1/2" barbs. My flow instantly droppped from 550 gph to about 300.)

willtel76 · 02/01/2007, 02:16 PM

What a time you are having choosing a pump!

Until recently my 15" cube was running with a Mag 7 as a return pump and I never really liked it. It was noisy and didn't seem to offer much flow with the 1/2" flex PVC I used to plumb the return. I also had a Mag 5 running my UV sterilizer and it wasn't much better than the 7.

I just finished plumbing in my replacement pump last night and I think I am happy. I went with a Reeflo Snapper as my one and only pump, it is whisper quiet and since I removed the two submersible Mag pumps my heater has a hard time keeping the tank above 79 degrees. I used 1 1/2" plumbing for the intake and 1 1/2' reduced to 2 3/4 returns for the return to the tank. In addition to providing all the flow for my tank the pump offers enough capacity to run my UV sterilizer, an additional output for an upcoming refugium and if I like there is enough pressure to run a kalk or calcium reactor all by just adding valves and some plumbing. The Reeflo pump uses less power than the 2 Mags I had before and I can safely valve the flow down to 300gph and not damage the pump.

Of course the pump is overkill for my 16 gallon system (if I open the valve all the way my overflow can't keep up) but I'm sick of buying equipment two or more times and being in a constant state of upgrade, this should be the last pump I will need for this system. I can post some pics if you like but I am using a sump so I'm not sure if plumbing on our systems are that similar.

eugenesa · 02/01/2007, 09:16 PM

A 2400 gph pump for 16 g tank?! And they say that I am crazy using a 600 gph one for 29g

So, it is really quiet (minimal noise + minimal vibration)? A good measure would be when you can't sense vibration when touching the tank or stand with your palm and/or can't hear any hum 6 ft away from it (as opposite to still hearing it in adjacent room). I wouldn't mind another $200 if it is really that good. Btw, PS2 is exactly that silent, while with Mag 7 I had to turn it off for the night because I couldn't sleep.

What kind of valves are you using to regulate the flow - ball or gate?

Beenalongtime79 · 02/01/2007, 10:40 PM

Quote:

Originally posted by eugenesa
Rufio, what are you using to pump water through the chiller, and at how much flow? My other concern was that the chiller would require its own loop, and I doubt that at 1/2" barb fitting it can be plugged into a 500 gph loop. (I just recently tried this with the in-line Hydor heater, it also had 1/2" barbs. My flow instantly droppped from 550 gph to about 300.)

I don't use the recommended flow through the chiller. I just use a simple and efficient maxijet 1200 on the chiller and it works great. One of the best purchases for my tank. My tank never drifts above where I want the temperature, which is 81 degrees.

There are huge advantages to keeping your tank temp. stable. Stability is key. It's worth it. I would rather spend the money on the chiller than to get another pump. If you are really thinking about purchasing the snapper, then really think hard about getting the chiller instead, because the chiller will help you in the summer months as well as right now, whereas the snapper may just help you now with the additional purchase of the chiller in the summer anyways.

Just plumb the 1/10 hp chiller with the maxijet 1200 (very quiet) and you should be golden. Rock steady temp (2 degree variance always) and no worries when summer temps. hit.

Peace,
John H.

eugenesa · 02/01/2007, 10:58 PM

I am not sure I understand how maxijet can be used to feed the chiller when the chiller is on the floor, while maxijet would be in the tank 6 feet above it...

I will need both the chiller (for summer time) and the Reeflo pump. The extra capacity of the latter can be used to feed the chiller when need be. I still think it is kinda extreme to use chiller when my ambient is at 68F (not to mention the chiller takes around 300W).

2 willtel76: does the Reeflo pump run hot? This would be extra proof that there is little heat transfer to the water...

Beenalongtime79 · 02/01/2007, 11:10 PM

eugenesa,

The maxijet 1200 is in my sump, so that was a pretty easy question to answer.

I also don't use 1/2" line. I use 5/8" line to and from the chiller.

So, the maxijet 1200 feeds into the chiller from the sump and then feeds back from the chiller into the sump.

Remember that the chiller only costs you 300 W to run while it is running. On a tank your size. The chiller might cut on only a few times throughout the day and night to control your temp. Also, the low ambient temp. just makes the chiller more efficient.

I think you could go do both ways (pump and chiller), but in the end, the chiller is the one thing that will make you happy. I'm almost sure of it.

You've spent so much time hassling with this stuff. Imagine being completely satisfied and no more hassle. I think that a chiller is definitely worth it.

Peace,
John H.

willtel76 · 02/02/2007, 09:51 AM

Quote:

Originally posted by eugenesa
A 2400 gph pump for 16 g tank?! And they say that I am crazy using a 600 gph one for 29g

So, it is really quiet (minimal noise + minimal vibration)? A good measure would be when you can't sense vibration when touching the tank or stand with your palm and/or can't hear any hum 6 ft away from it (as opposite to still hearing it in adjacent room). I wouldn't mind another $200 if it is really that good. Btw, PS2 is exactly that silent, while with Mag 7 I had to turn it off for the night because I couldn't sleep.

What kind of valves are you using to regulate the flow - ball or gate?

It is really quiet but I can still hear it six feet away, it is a low hum, more like a fan than a pump and almost zero vibration. This is a low RPM pump and I think that makes it a little quieter. My pump is located in a pantry with the sump and connects to the tank through a wall.

I'm currently using ball valves to control flow but I may have to switch to a gate valve for the main adjustment because it is a little tricky. If I open it a little too far I could end up with a very expensive lawn sprinkler in my dining room!

eugenesa · 02/03/2007, 01:12 PM

Ok, I am going to order it on Monday... And if it turns out to be too noisy then I guess I will have to get another Gorman Rupp. And the chiller, of course. "Money, money, money.. Must be funny in the rich men's world..."

willtel76 · 02/08/2007, 09:34 PM

Did you get your pump yet?

Here are some pictures of my current plumbing. Most of this will change as soon as my diamond hole saws arrive. I'm going to drill the sump to eliminate the U pipe and I will plum in the other 3/4 return to the tank. I'm also going to enlarge my drain to 1.5 inches from 1 inch.

Never finished.

The hole mess.

eugenesa · 02/08/2007, 10:40 PM

I just ordered the pump yesterday along with a couple of gate valves and a bunch of other plumbing... Hope to get everything by the next weekend.

Nice setup, btw. So can you hear the pump from behind this wall (from the side of your display tank)?

Icefire · 02/08/2007, 11:13 PM

Another option would be an Hagen Aquaclear 901, 935Gph, 62w, 2m head loss.

I'll be running a 802 to get ~200gph in my sump @ 4.5 feets

willtel76 · 02/09/2007, 01:39 PM

Quote:

Originally posted by eugenesa
I just ordered the pump yesterday along with a couple of gate valves and a bunch of other plumbing... Hope to get everything by the next weekend.

Nice setup, btw. So can you hear the pump from behind this wall (from the side of your display tank)?

No. The sound of the water lapping in the overflow is louder than the pump. I got rid of my durso when I added this pump and my tank is close to silent.

My new 200 watt heater should be here today but I'm thinking I may insulate my sump to save on power consumption in the winter. I keep my house around 69 and the ranco is set to 80, the heater (100 watt) has been running a lot even with the halide on since I ditched the MAGs.

kodyboy · 02/09/2007, 05:50 PM

sounds like a true pain in the &^*&%*^* for a 29! I have a hydor seltz and it is great! I think it can be used both internally and externally.
Another point: having a little flexible tubing can reduce vibrations dramatically

I agree with PJF, you are running equipment that is overkill on your system. His recommendations are spot on.

eugenesa · 02/18/2007, 12:16 AM

Well, I finally got my Snapper and gave it a try. Putting it bluntly, to call this pump quiet is a joke. Now it may be true that it is really quite for a 2000+ gph pump (sorry, I have no experience with any of those), however, it is probably one of the most loud ones I have tried so far for my 500+ gph flow. It does however have a very low heat transfer. So, after like 3+ months and quite a few $$ spent, the pump ranking looks like this:

1. Poseidon PS2. This is the quietest one, period. Very low vibration - it can be dropped directly on the cabinet wood floor, and with both cabinet doors closed one can hardly hear any hum 3 ft away. Any other pump described below will require at least some sort of vibration-damping mounting, as otherwise your cabinet becomes a perfect subwoofer. Unfortunately, PS2 has the highest heat transfer out of all the pumps I have tried - it brings my 29g system to +16F above ambient!

2. Gorman Rupp 14110. This is the second quietest pump I have seen. Without any vibration-damping mounts will generate some audible hum. Silly me, I have not measured its heat transfer before I sold mine at half-price, but I now expect it to be at the low end. This is the pump I will be getting next (and hopefully the last one I will need).

3. Eheim 1262. It is almost quiet noise-vise, but its vibration level is fairly high. Without proper mounts the hum is unbearable. When placed on two layers of bubble-wrap, the resulting hum is equal to that of Gorman Rupp without any special mounts

The heat transfer is also fairly high - brings my system up to about +7F above ambient.

4. ReeFlo Snapper. Medium noise and significant vibration. Without proper mounts the hum is unbearable. When on 2 layers of bubble-wrap the hum and noise are still clearly audible within 20 ft. Very low heat transfer - +1..2 F above ambient for my system.

5. MagDrive 7. Very high vibration. When it was placed directly on the cabinet floor, I could not fall asleep in the adjecent room and had to turn it off. Did not measure heat transfer.

The xext step will be getting a chiller and order yet another Gorman Rupp.

Beenalongtime79 · 02/18/2007, 08:52 AM

You never even considered an Ocean Runner pump. It is quiet IMO.

The chiller will be your best bet... but I think you would be pretty happy with the OR pump, although it seems like you are especially, especially, especially sensitive to sound so you may never be happy.

Cheers,
John

Drewcipher · 02/18/2007, 09:37 AM

I have a 26 gallon tank that I have messed with as much as you and I found that my solution was to put a chiller inline with my canister filter(eheim proII)m and a closed loop with an eheim 1260 attached to a SCWD. I can't even imagine the turbulence if I took the SCWD out. Anyway, I put a small rubber mat(from marine depot) under the eheim and I am very happy with the noise level.

Also, I have 2 arctica 1/10 HP chillers and they are both quiet, but there are some smaller ones available now as well that would be fine for a small tank and be quieter still.

eugenesa · 02/18/2007, 05:02 PM

My current understanding is that Ocean Runner, Eheim and MagDrive all share the same design principle, and as such will have common problems - vibration and medium heat transfer. I blame their vibration on the fact that all those pumps have a plastic enclosure, so a 1/2 millimeter misallighment between the two rotor mounting points is probably very common and this is what determines their vibration level. Obviously nobody at the factory is spending any time balancing their rotors, and while the same is very likely true for any solid-metal motor like Gorman Rupp, the later are probably manufactured with a better precision .

Beenalongtime79 · 02/18/2007, 05:15 PM

Good luck man. I hope you find the perfect pump. The OR is quiet enough for me.

I just set one up on a friend's tank and it works really well and is silent. Drop a little foam under the pump and you should be fine. Then again, you seem to be really sensitive to any noise at all.

Anyways, hopefully your saga will end eventually.

Cheers,
John H.

eugenesa · 02/18/2007, 05:48 PM

I have just ordered the 1/15 HP chiller. Somehow I suspect my next saga will be about how loud those chillers are

Btw, I would be OK with my Eheim 1262 wrt noise, it is just it still brings my system up to above 80F, so the chiller would still be a must. Now I am thinking that if the chiller turns out being really quiet, I may even keep my PS2 and run the chiller full time. We'll see in a week when the chiller arrives.

01/31/2007, 03:07 PM	#27
ErikS Registered Member Join Date: Nov 2001 Location: VA Posts: 2,199	Always tough to keep a small tank cool. Lights, pumps, etc add heat. Active cooling - fans in the canopy, fan on the sump, the cooling you linked to - all should help. Don't like powerheads? Small return pump & closed loop powered by a small pump (about the same as powerheads in the tank)? __________________ It's just my opinion & it's worth exactly what you paid for it

02/08/2007, 11:13 PM	#42
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	Another option would be an Hagen Aquaclear 901, 935Gph, 62w, 2m head loss. I'll be running a 802 to get ~200gph in my sump @ 4.5 feets __________________ Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT Lights @ 100% all others, 35% White Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI

02/18/2007, 09:37 AM	#47
Drewcipher Premium Member Join Date: May 2004 Location: Bailey, CO Posts: 896	I have a 26 gallon tank that I have messed with as much as you and I found that my solution was to put a chiller inline with my canister filter(eheim proII)m and a closed loop with an eheim 1260 attached to a SCWD. I can't even imagine the turbulence if I took the SCWD out. Anyway, I put a small rubber mat(from marine depot) under the eheim and I am very happy with the noise level. Also, I have 2 arctica 1/10 HP chillers and they are both quiet, but there are some smaller ones available now as well that would be fine for a small tank and be quieter still. __________________ Drew I'm growing older but not up My metabolic rate is pleasantly stuck Let those winds of time blow over my head I'd rather die while I'm living than live while I'm dead--Jimmy Buffett Current Tank Info: 75 gallon, Red Sea Max, setting up a 180

01/31/2007, 02:59 PM	#26
Beenalongtime79 Registered Member Join Date: Jul 2001 Posts: 4,437	Get a chiller

01/31/2007, 10:17 PM	#28
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	All right, now what do we know about noise levels of various powerheads? I just put Rio 600 in the tank, and the resulting hum (from tank and stand vibration) is way beyond my comfort level. How do these compare?

01/31/2007, 10:20 PM	#29
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	.. Also it would now be very interesting to try the Gorman Rupp 14110. It takes only 65W, and it runs very hot meaning there should be very little heat going into the water. Too bad I have sold mine shortly after I have got my PS2, not yet knowing about the heat problem...

01/31/2007, 10:31 PM	#30
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	> Get a chiller I will. But I was hoping to only use it during Summer time, not through the whole year. I strongly suspect the chiller will be noisy (apparently, in this business every device generates either a lot of heat, or a lot of noise, or, often, both )

02/01/2007, 12:42 PM	#31
Beenalongtime79 Registered Member Join Date: Jul 2001 Posts: 4,437	Get the currentusa 1/10 hp chiller. If you think that thing produces too much noise, then you are too OCD to keep a reef tank. I've got the same model and it is rock steady as well as quiet. I doubt it gets over 25 db. It would handle your system with ease. Peace, John H.

02/01/2007, 12:59 PM	#32
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	Rufio, what are you using to pump water through the chiller, and at how much flow? My other concern was that the chiller would require its own loop, and I doubt that at 1/2" barb fitting it can be plugged into a 500 gph loop. (I just recently tried this with the in-line Hydor heater, it also had 1/2" barbs. My flow instantly droppped from 550 gph to about 300.)

02/01/2007, 02:16 PM	#33
willtel76 Registered Member Join Date: Jul 2004 Location: Atlanta Posts: 113	What a time you are having choosing a pump! Until recently my 15" cube was running with a Mag 7 as a return pump and I never really liked it. It was noisy and didn't seem to offer much flow with the 1/2" flex PVC I used to plumb the return. I also had a Mag 5 running my UV sterilizer and it wasn't much better than the 7. I just finished plumbing in my replacement pump last night and I think I am happy. I went with a Reeflo Snapper as my one and only pump, it is whisper quiet and since I removed the two submersible Mag pumps my heater has a hard time keeping the tank above 79 degrees. I used 1 1/2" plumbing for the intake and 1 1/2' reduced to 2 3/4 returns for the return to the tank. In addition to providing all the flow for my tank the pump offers enough capacity to run my UV sterilizer, an additional output for an upcoming refugium and if I like there is enough pressure to run a kalk or calcium reactor all by just adding valves and some plumbing. The Reeflo pump uses less power than the 2 Mags I had before and I can safely valve the flow down to 300gph and not damage the pump. Of course the pump is overkill for my 16 gallon system (if I open the valve all the way my overflow can't keep up) but I'm sick of buying equipment two or more times and being in a constant state of upgrade, this should be the last pump I will need for this system. I can post some pics if you like but I am using a sump so I'm not sure if plumbing on our systems are that similar.

02/01/2007, 09:16 PM	#34
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	A 2400 gph pump for 16 g tank?! And they say that I am crazy using a 600 gph one for 29g So, it is really quiet (minimal noise + minimal vibration)? A good measure would be when you can't sense vibration when touching the tank or stand with your palm and/or can't hear any hum 6 ft away from it (as opposite to still hearing it in adjacent room). I wouldn't mind another $200 if it is really that good. Btw, PS2 is exactly that silent, while with Mag 7 I had to turn it off for the night because I couldn't sleep. What kind of valves are you using to regulate the flow - ball or gate?

02/01/2007, 10:58 PM	#36
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	I am not sure I understand how maxijet can be used to feed the chiller when the chiller is on the floor, while maxijet would be in the tank 6 feet above it... I will need both the chiller (for summer time) and the Reeflo pump. The extra capacity of the latter can be used to feed the chiller when need be. I still think it is kinda extreme to use chiller when my ambient is at 68F (not to mention the chiller takes around 300W). 2 willtel76: does the Reeflo pump run hot? This would be extra proof that there is little heat transfer to the water...

02/01/2007, 11:10 PM	#37
Beenalongtime79 Registered Member Join Date: Jul 2001 Posts: 4,437	eugenesa, The maxijet 1200 is in my sump, so that was a pretty easy question to answer. I also don't use 1/2" line. I use 5/8" line to and from the chiller. So, the maxijet 1200 feeds into the chiller from the sump and then feeds back from the chiller into the sump. Remember that the chiller only costs you 300 W to run while it is running. On a tank your size. The chiller might cut on only a few times throughout the day and night to control your temp. Also, the low ambient temp. just makes the chiller more efficient. I think you could go do both ways (pump and chiller), but in the end, the chiller is the one thing that will make you happy. I'm almost sure of it. You've spent so much time hassling with this stuff. Imagine being completely satisfied and no more hassle. I think that a chiller is definitely worth it. Peace, John H.

02/03/2007, 01:12 PM	#39
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	Ok, I am going to order it on Monday... And if it turns out to be too noisy then I guess I will have to get another Gorman Rupp. And the chiller, of course. "Money, money, money.. Must be funny in the rich men's world..."

02/08/2007, 09:34 PM	#40
willtel76 Registered Member Join Date: Jul 2004 Location: Atlanta Posts: 113	Did you get your pump yet? Here are some pictures of my current plumbing. Most of this will change as soon as my diamond hole saws arrive. I'm going to drill the sump to eliminate the U pipe and I will plum in the other 3/4 return to the tank. I'm also going to enlarge my drain to 1.5 inches from 1 inch. Never finished. The hole mess.

02/08/2007, 10:40 PM	#41
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	I just ordered the pump yesterday along with a couple of gate valves and a bunch of other plumbing... Hope to get everything by the next weekend. Nice setup, btw. So can you hear the pump from behind this wall (from the side of your display tank)?

02/09/2007, 05:50 PM	#44
kodyboy Moved On Join Date: May 2003 Posts: 2,990	sounds like a true pain in the &^&%^* for a 29! I have a hydor seltz and it is great! I think it can be used both internally and externally. Another point: having a little flexible tubing can reduce vibrations dramatically I agree with PJF, you are running equipment that is overkill on your system. His recommendations are spot on.

02/18/2007, 12:16 AM	#45
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	Well, I finally got my Snapper and gave it a try. Putting it bluntly, to call this pump quiet is a joke. Now it may be true that it is really quite for a 2000+ gph pump (sorry, I have no experience with any of those), however, it is probably one of the most loud ones I have tried so far for my 500+ gph flow. It does however have a very low heat transfer. So, after like 3+ months and quite a few $$ spent, the pump ranking looks like this: 1. Poseidon PS2. This is the quietest one, period. Very low vibration - it can be dropped directly on the cabinet wood floor, and with both cabinet doors closed one can hardly hear any hum 3 ft away. Any other pump described below will require at least some sort of vibration-damping mounting, as otherwise your cabinet becomes a perfect subwoofer. Unfortunately, PS2 has the highest heat transfer out of all the pumps I have tried - it brings my 29g system to +16F above ambient! 2. Gorman Rupp 14110. This is the second quietest pump I have seen. Without any vibration-damping mounts will generate some audible hum. Silly me, I have not measured its heat transfer before I sold mine at half-price, but I now expect it to be at the low end. This is the pump I will be getting next (and hopefully the last one I will need). 3. Eheim 1262. It is almost quiet noise-vise, but its vibration level is fairly high. Without proper mounts the hum is unbearable. When placed on two layers of bubble-wrap, the resulting hum is equal to that of Gorman Rupp without any special mounts The heat transfer is also fairly high - brings my system up to about +7F above ambient. 4. ReeFlo Snapper. Medium noise and significant vibration. Without proper mounts the hum is unbearable. When on 2 layers of bubble-wrap the hum and noise are still clearly audible within 20 ft. Very low heat transfer - +1..2 F above ambient for my system. 5. MagDrive 7. Very high vibration. When it was placed directly on the cabinet floor, I could not fall asleep in the adjecent room and had to turn it off. Did not measure heat transfer. The xext step will be getting a chiller and order yet another Gorman Rupp.

02/18/2007, 08:52 AM	#46
Beenalongtime79 Registered Member Join Date: Jul 2001 Posts: 4,437	You never even considered an Ocean Runner pump. It is quiet IMO. The chiller will be your best bet... but I think you would be pretty happy with the OR pump, although it seems like you are especially, especially, especially sensitive to sound so you may never be happy. Cheers, John

02/18/2007, 05:02 PM	#48
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	My current understanding is that Ocean Runner, Eheim and MagDrive all share the same design principle, and as such will have common problems - vibration and medium heat transfer. I blame their vibration on the fact that all those pumps have a plastic enclosure, so a 1/2 millimeter misallighment between the two rotor mounting points is probably very common and this is what determines their vibration level. Obviously nobody at the factory is spending any time balancing their rotors, and while the same is very likely true for any solid-metal motor like Gorman Rupp, the later are probably manufactured with a better precision .

02/18/2007, 05:15 PM	#49
Beenalongtime79 Registered Member Join Date: Jul 2001 Posts: 4,437	Good luck man. I hope you find the perfect pump. The OR is quiet enough for me. I just set one up on a friend's tank and it works really well and is silent. Drop a little foam under the pump and you should be fine. Then again, you seem to be really sensitive to any noise at all. Anyways, hopefully your saga will end eventually. Cheers, John H.

02/18/2007, 05:48 PM	#50
eugenesa Registered Member Join Date: Sep 2006 Location: WA, USA Posts: 33	I have just ordered the 1/15 HP chiller. Somehow I suspect my next saga will be about how loud those chillers are Btw, I would be OK with my Eheim 1262 wrt noise, it is just it still brings my system up to above 80F, so the chiller would still be a must. Now I am thinking that if the chiller turns out being really quiet, I may even keep my PS2 and run the chiller full time. We'll see in a week when the chiller arrives.