i have just built a sump for my 55 and a DIY pvc
overflow. im wondering what is the gph
my overflow will put out if its made with 3/4" pvc
??? my return pump puts out 581 gph
. am i correct in assuming the gph
between the pump and the siphon have to be similar???? everythings built i just have to put it together and i have ball valves in line to adjust flow where needed on either end. thanks!