I would like some advise on installing a return line from my diy wet/dry filter, I have also installed the diy pvc overflows (1 inch each) on my 125 gallon aquarium. For my pump I am using a mag drive 7, when I hooked it up the pair of overflows could not keep up with the pump. I have read in previous threads that you could install a "t" connector and divide part of water flow back to the sump, I would like to know for those who use the mag drive waterpumps, is there a pvc coupler that will accept the 3/4ths threaded size and the opposite side would measure 1 inch? I anyone has any illustrations or photos of a plumbing schematic would be appreciated. thanks