2 Mag12's..Too much Heat???

[Angelscrx]

The heat issue would come in to play if they were both submerged. The bigger mag pumps do introduce more heat into a tank if they are used submerged. Not really bad if used externally IME.

 

[ronj]

Finn, you have 3 mag pumps on a 40g and you don't have heat issues???i hope mine work out ok...one will be external and the other will be internal..the internal one was creating some very warm water in my cure tank