Closed Loop

johncook109 · 03/27/2009, 12:18 PM

Hi there, I just wish to know at what hieght you put the hole to supply the pump from the water level. Its just my concerns about not letting the pump run dry as the water may lower.

kraze3 · 03/27/2009, 12:34 PM

IMO the pump should be low, maybe a little less than half way down. You dont want it so low that it sucks in any sand. But you dont want it to create a tornado and suck in air from the sirface.

Fish_wiz2 · 03/27/2009, 12:34 PM

You can put it anywhere just not below the water level, i recommend in the middle of the tank.

jgln · 03/27/2009, 12:43 PM

If I understand what I am reading you guys just gave totally different advise, correct?

Fish_wiz2 · 03/27/2009, 12:48 PM

Not really, mine is pretty much his but less detailed and missing some parts (my hands are tired

). Wiz

IslandCrow · 03/27/2009, 12:55 PM

I think Fish_wiz meant "not above water level". And as kraze pointed out, you don't want it just barely below the water surface either, or it's going to suck in air from the surface. Depending on how powerful the pump is, you may actually want it draining from a couple holes to reduce the suction at any one. I have a closed loop, but my tank's not drilled (I use an over the back feed), so I'm afraid I don't have any personal experience.

jgln · 03/27/2009, 01:47 PM

I guess I just wanted it to be clear to the person with the question. Had I not had some experience those two statements would have confused the hell out of me. :-)

suasponte2/75 · 03/27/2009, 11:08 PM

I have mine slightly above the middle but far down enough from the top but definitely not at the bottom lower portion.... I'm just teasin'

.

I had the same worries when I did my closed loop and decided to place it in middle and have been fine with it since. Mine's a 180G tank so I had 24" of height to play however. It would help to let us know what size tank as well as the intended return pump. HTHs.

johncook109 · 03/30/2009, 01:32 AM

Yes, well thank you all. I don`t want to brag but I have 30 inches to play with so from the information received I shall opt for just over half way up the water depth. thanks again. I take on board your comments about suction as I shall be using an Ocean Runner 6500, maybe I will drill two holes to reduce this effect.

03/27/2009, 12:18 PM	#1
johncook109 Registered Member Join Date: Jan 2009 Location: Bournemouth Posts: 2	Closed Loop Hi there, I just wish to know at what hieght you put the hole to supply the pump from the water level. Its just my concerns about not letting the pump run dry as the water may lower.

03/27/2009, 12:34 PM	#3
Fish_wiz2 Mangroves are kool. Join Date: Nov 2007 Location: Chicago Posts: 5,246	You can put it anywhere just not below the water level, i recommend in the middle of the tank. __________________ -The Wiz Current Tank Info: Elos Mini Seahorse Tank, 2500 gallon Koi pond

03/27/2009, 12:43 PM	#4
jgln Registered Member Join Date: Aug 2004 Location: Pedricktown,NJ Posts: 555	If I understand what I am reading you guys just gave totally different advise, correct? __________________ Jim Current Tank Info: 125g reef with 30g sump/fuge

03/27/2009, 12:48 PM	#5
Fish_wiz2 Mangroves are kool. Join Date: Nov 2007 Location: Chicago Posts: 5,246	Not really, mine is pretty much his but less detailed and missing some parts (my hands are tired ). Wiz __________________ -The Wiz Current Tank Info: Elos Mini Seahorse Tank, 2500 gallon Koi pond

03/27/2009, 12:55 PM	#6
IslandCrow Reef Monkey Join Date: Sep 2005 Location: Rockledge, Fl Posts: 5,759	I think Fish_wiz meant "not above water level". And as kraze pointed out, you don't want it just barely below the water surface either, or it's going to suck in air from the surface. Depending on how powerful the pump is, you may actually want it draining from a couple holes to reduce the suction at any one. I have a closed loop, but my tank's not drilled (I use an over the back feed), so I'm afraid I don't have any personal experience. __________________ All opinions in the above message should be taken with 35 ppt salt. -Mike C. Current Tank Info: I have a reef screen saver on my phone, does that count?

03/27/2009, 12:34 PM	#2
kraze3 Registered Member Join Date: Jan 2006 Location: RI Posts: 2,373	IMO the pump should be low, maybe a little less than half way down. You dont want it so low that it sucks in any sand. But you dont want it to create a tornado and suck in air from the sirface.

03/27/2009, 01:47 PM	#7
jgln Registered Member Join Date: Aug 2004 Location: Pedricktown,NJ Posts: 555	I guess I just wanted it to be clear to the person with the question. Had I not had some experience those two statements would have confused the hell out of me. :-) __________________ Jim Current Tank Info: 125g reef with 30g sump/fuge

03/27/2009, 11:08 PM	#8
suasponte2/75 Premium Member Join Date: Jun 2002 Location: The Bay Area (Fremont, CA) Posts: 514	I have mine slightly above the middle but far down enough from the top but definitely not at the bottom lower portion.... I'm just teasin' . I had the same worries when I did my closed loop and decided to place it in middle and have been fine with it since. Mine's a 180G tank so I had 24" of height to play however. It would help to let us know what size tank as well as the intended return pump. HTHs.

03/30/2009, 01:32 AM	#9
johncook109 Registered Member Join Date: Jan 2009 Location: Bournemouth Posts: 2	Closed Loop Yes, well thank you all. I don`t want to brag but I have 30 inches to play with so from the information received I shall opt for just over half way up the water depth. thanks again. I take on board your comments about suction as I shall be using an Ocean Runner 6500, maybe I will drill two holes to reduce this effect.