Now were talking people. Now were talking. acrylic. Thats the stuff. Now that I'm thinking about it.... The WHOLE viewing area doesnt have to be a tank made out of acrylic (that would be nice..but I bet it's really expensive.) But to do this on the cheap I bet I could build a framed in viewing area withing the pilons of the dock out of wood. Line it with rubber pond liner. Then cut holes for token skylight windows. The problem would be getting that thing to completly seal. I was watching this guy make a fish tank from scratch. He used glass, a framed metal cage...and clear acryclic caulk...but with that much presure? Who knows if that would keep a dry seal?
