MarineGirl411
New member
Puff, I'm sorry but I don't understand what you mean. I was thinking of using 2 of the overflow holes for the drain to the sump, then the other 2 for the closed loop. Return would be on a sea swirl and the closed loop would be on a sea swirl as well. I didn't know if it would work to use the 2 overflow holes as a closed loop. I hope that makes sense.