so you're saying go with one sump? i'm still in the plumbing stage looking how i want to plumb this tank. i was thinking of running one sump, but using two drains from each side of the tank, plumbed to the sump. i was trying to see how you plumbed your intakes, looks like your tank has overflows. i'm probably making this over complicated but i want to make sure, so i can sort of "set it, and forget." and about your sumps, i was just noticing the white pvc piping, wondering how it works. looks like some intricate spray bar.