another pump recomendation

[adunne]

2 x 1" drains from a 75g main to a 30g sump/refugium. any pump reccomendations? I was thinking of a mag 12 split into 2 returns both on ball valves.. good? bad? to much?

[fatrip]

probibly too much but it depends on how much head height you are going to have on the pump. it isnt the greatest to valve down mag pumps. your over flows will certiany keep up with that pump but im not sure if you want that much flow in you sump. first what is goin to be in your sump? skimmer, DSB, refug, carbon, phophate controller???i would probibly go with a mag7 or 9.5. also how many power heads are you going to have? you need to think of how much flow you want the return to produce.

[mg426]

that is going to be a lot of flow through your sump. mabe a Mag 7 would be a better choice. Make up the additional flow with a Closed loop or a few PHs.

[dorkfish3]

I would also agree on a mag 7 depending on how high your tank is from your sump and how many 90 degree angles there are. but if you put an indirect ball valve on your return that will be ok. what I mean is put a PVC T fitting in and put a ball valve on that. I do that because if you put it directly in line of your return it will eventually burn your pump up by overworking it.

[dorkfish3]

I have an example picture in my gallery. its the second one.

[adunne]

thanks for the imput!

fatrip - the sump will have a fuge, skimmer, phonsban reactor in it.

It will have about 3 feet of head. Both returns will have ball valves indirectly. No ball valve directly in line with the pump. Problem is i made the age old mistake and already got the pump..lol got caught up in the excitment of building my own sump. I was trying to match drain with return but then come to think of it you can only drain what you are returning so i started to think a mag 12 might be much.

you think if the valves are closed slightly it will be ok or should i bite the bullet and get a mag 7?

[fatrip]

if you close the vavles even slitly you are putting pressure on the pump, and mag drives wil do fine for a bit with pressure but long term the pump will break down and quit on you alot faster. and if you are having a fuge, you will deff want the mag 7. to much flow through will defeet the purpose of even having one.

[adunne]

man oh man im startin to second guess

I was planning to take one drain line and T it with a ball valve on the refug side. I would throttle down the flow into the refuge and let the excess drain to the skimmer section. I figured this would work..hmmm

I definetly dont want to burn out the 12 and also dont want to put a bunch of 90's on the return to help reduce the flow.. think im stuck getting another pump?

[fatrip]

that sounds good with the fuge but yes you will need to get another pump, it is going to be too much for your tank if you dont.

[adunne]

&#!$% %*&%$$ #$&^@# !!!!!!!!!!!!!! lol

[fatrip]

yea it is a very unforgiving hobby...lol...but try and sell it on the selling forum. im sure some one will be interested.

[adunne]

yeah will do. Let me ask though - in your opinion whats the harm of running full bore with the mag 12? The over flow can keep up. Just to much linear flow in the main tank?

[fatrip]

to much flow through the sump and heat issues in the summer. you can point the returns to the mains in any direction. you wont get as good skimming or filtration because of the fast current in the sump. but mag 12s get fairly warm. my mag 9.5 left over night in a 35 gallon water change tub will heat the water to 92-96 degrees in the summer time. just to give you some perspective on the heat out put of those pumps. but im sure you could run it for now with out a problem. you might need to make your returns to the main tank a little lower in the tank because with that much force it may make too much turbulance on the top of the water and put water out of the tank.