This is for you Dr. Joe I sent you a couple of pms about whether or not this tank would hold water. The tank is 3/4" plywood and there are 2x2s in every seam. I have fg double on the seams and single on the flat sides. So far only one coat of epoxy but I plan on about 3. Sorry for the lack of pics but gf had it on vacation so this is what I have so far.