ONE VERY BIG FISHY
do you have to have a sump drilled? this is what i was planning on doing, this is just an example not the real thing....ok say you have a tank that has two overflows and two returns and lets say the tank is a 100 gallon just to keep things simple, ok so you have a 20long for a sump, so you have pvc coming from the two overflows into the sump, via over the top of the sump...and you have the mag 10 in the sump plumbed out over the top to the two returns. would this work? I am thinking so, but had to pass it by you guys, and if this does work then why get a sump drilled?