I have four penductors and an iwaki(md100rlt) pump that i'd like to use for my return. Has anyone used a simular setup? Is 4 too many for that size tank? The sump is in the basement and total flow is just under 1500gph w/out the penductors plumbed in. Oh,there 1"..same as my return is going to be. I would love to make a manifold for them and eliminate the need for ugly powerheads! Has anyone done something simular to this?