im shure that a few of you have built your own pond setups and i am just wondering what you have used to seal an concrete work that you have done in your ponds i took two kiddie pools and cut them to fit together like a figure eight shape and raised one up eight inches and then siliconed the two of them together and made a little "ramp" to have a water fall between the two of them and i need some ideas on what i should use to seal the concrete or maybe i dont even know maybe i dont even need to seal the concrete so if anyone has any intelligent input it would be greatly appreciated name brands or kinds of sealants you know anything like that.