We are going to start the process of building our own cement pond. After having an in ground liner pond for several years and getting tired of dealing with the liner, we decided to cement it ourselves. The only problem is that I don't know what sealers to use. Does anybody know of any that are safe to use with fish? We have all the rest down and planned, just need to know what kind of sealers are safe for the fish. I have looked at pool paint and sealers, but I don't know if they are safe. Any help would be great. Thanks.