skynoch;2963167; said:Just google vermiculture or red worm composting. This would work great for young or small rays but as they get bigger it would end up being alot of work cleaning all the worms you needed to feed you fish. My small rays 9" or less will eat about 30 african nightcrawlers a day. Red worms are quite a bit smaller than that even. So if you do decide to do it you may want the african nightcrawlers instead. Nothing beats the old canadian nightcrawler but they don't work in a composting situation.
That's a lot of worms. Won't your rays eat anything else? I only feed Canadian Night Crawlers as a treat every third day or so. There's a tackle shop on my daily running around that sells 12 for $3.50. So not exactly cheap, but not too bad either.