Dugthefish
New member
My new used tank has two corner overflows, each with one 3/4" hole and one 1" hole. 1600gph pump @ 0 head pressure. Would like enough flow to be able to keep variety of corals.
Herbie 3/4" x2, 1" emergency x2, return over the back
Herbie 3/4" x2, 1" emergency x1, 1" return
Herbie 3/4" x1, 1" emergency ×1, return over the back, and rip out/plug the second overflow.
Herbie 3/4" x2, 1" emergency x2, return over the back
Herbie 3/4" x2, 1" emergency x1, 1" return
Herbie 3/4" x1, 1" emergency ×1, return over the back, and rip out/plug the second overflow.