I let them go for a swim everyday. In my big bathtub,lol. I clean broader EVERYDAY! I have done anything an everything I know to do for the water. As o now I have a milk jug with an oval opening cut out so they can stick head in to water. I have it an th food container sitting down in an old 9x13 cake pan at on end of broader. But it still gets nasty everyday. Their stool Ian to bathe there is just a lot of it.