View Full Version : Mag 7 Plumbing Questions

12/25/2007, 08:58 PM
Hey guys,
My mag 7 has increased my tank temp to 81 with the daylights on. I was thinking of rebuilding my sump to make a bigger fuge and lowering tank temps by relocating the protein skimmer and mag7 outside of it. Would it be alright to have the inlet to the pump go up over the side of the sump and into the water.

Ill post a quick pic to show you what Im thinking. It isnt to scale at all. The sump is 10g overall

thanks guys


edit: i forgot to mention that the skimmer return and the inlet to the mag7 will be out of the compartment from the overflow

12/26/2007, 11:08 AM
It will not work. The Mag7 can't create the siphon to draw the water over the tank.

Have you consider replacing the Mag7 with an Eheim pump?

12/26/2007, 01:02 PM
i dont really see it as a siphon. Ill probably test it later. wouldnt the pump just bringing in the water like normal, it just has to go over the side of the tank

12/26/2007, 01:04 PM
<a href=showthread.php?s=&postid=11459210#post11459210 target=_blank>Originally posted</a> by obzezzed350
it just has to go over the side of the tank

thats what he means by syphon. the pump will not be able to pull water over the tank.

12/26/2007, 01:06 PM
gotcha...I see what you mean

12/26/2007, 01:08 PM
I would think this could work, if you prime the pump first. If you just started it up dry, it wouldn't be able to get the water flowing, that is a lot of air in the plumbing to get out.
Maybe prime it by feeding the intake with a powerhead, and once the plumbing is all filled, turn the mag7 on.

12/26/2007, 01:52 PM
I used to run my mag 7 external but it runs very hot you will need a fan to blow across it. Try a clip on Air King fan very quite. PS Marine Depot states that it is to be sub. only