Originally Posted by fishman
Not to high jack this, but can someone explain a closed loop and or send pics of this? I have 6 PH
's in my tank and HATE them! I really want to do a closed loop as it sounds better. I have 2 overflow boxes with 1 outlet.
I believe, judging by what Brenden posted and what I've since read, a closed loop is as simple as some sort of outlet (I saw one with a length of pvc
with holes drilled in it) connected to an external pump. The water is then redirected directly from the pump back into the main tank in however many returns you choose.