[ufimych]

Thank you for the answers. I am surprised how little water may be enough to run the culture and even feed fish. I will go for the kiddie pool. I will put it in the shade of the barn to avoid overheating. I have plenty of goat manure mixed with straw to enhance water bloom. I thought the plastic stuff would not last long. We have a small pond about50X50 feet and about 5 feet deep in the middle. It had some crustacean to feed aquarium fish. However, I populated it with goldfish and channel catfish. No more daphnia since then. They consume it all. On the bright side, I can eat my own fish now.