<http://www.science.nus.sg/~sbs/fish/livefood/moina.html> This link doesn't appear to work anymore. It used to go to a very informative page on commercial raising of Daphnia in Singapore. There were also links to bllod worm rearing. commercial breeding of guppies, dwarf gouromies, and discus. If any one has an updated address for this site let me know. Jeremy