Hello All My name is Mark I am planning on possibly building a plywood tank and would like some feedback from anyone who has experience doing this. I have a perfect spot in the basement where I am finishing a room for a built in tank. Dimensions would be 43"w x 33"d x 36"h about 210gals in an almost cube type shape. I've been reading articles about this and have some ?'s. 1) One thing I read was someone using West Marine epoxy resin to seal the tank. Will this work in a salt water tank, and because it's clear can the wood be painted first? 2)Does anyone have experience building in overflows? None of the tanks I have seen have built in overflows. We'll start there. Any help from experienced builders would be greatly appreciated.