Dan Feller;1530354; said:I have seen tiled ponds and tanks in Mexico, but always over concrete. Tiles will crack/pop off if there is ANY flex in the tank. I think it would be difficult (if not impossible) to build a stiff enough plywood tank. Last of all, tile and grout are heavy. The benefit of a plywood tank versus concrete is mostly the portability factor, a big tiled tank would be a lot heavier than a fiberglassed one.
Sorry to be so negative, but it doesn't seem very practical.