ncox38
New member
I am setting up a larger QT because I kill everything i put in the 20 gal QT. I have a 40 breeder that has 1 hole dilled in the back for a overflow. It has a 1" bulkhead and a 3/4" 90 degree elbow acting as the overflow. My question is what size return pump should i use? A 1" bulkhead is like 600 gph, but does the lack of an overflow box reduce the amount i should try to put through it. I will have an old 20 gal oceanic trickle filter as a sump.