Cool, ill see about them, turns out the ponds gonna have to go outside. To water proof the wood would thompsons water sealer work. I have like 2 gallons of it left over thats been sitting in my garage for a few years?
It seems the bullhead, gotta find out about legality issues. My biggest concern is the fish poking a hole in the liner still, it's only 20'm PVC so it's not like heavy duty stuff.