Herbivorous cichlids have long intestinal tracts, and therefore, it is quite common for them to have intestinal problems. This is especially true of Mbuna, whose digestional tracts are made for vegetable matter. They have long intestines (4x their body length) designed to extract the proteins and carbohydrates from the hard-to-digest algae. Cows and other ungulates use several stomachs to digest grass. Mbuna, on the other hand, do it with only one stomach and a very long intestine. For this reason, it is also a good idea to occassionally fast your fish -- give them a day off -- as this allows them to purge their intestines on a regular basis. Use caution when doing this because hungry Cichlids are aggressive cichlids.
http://www.cichlid-forum.com/articles/f ... chlids.phpFrozen food. Any food that is high in animal protein, such as krill, brine shrimp, daphnia, plankton, bloodworms, and micro-worms should be used sparingly. And for herbivorous fish, they should not be used at all. I've had poor luck using these and since discontinuing their conservative use, have practically abolished "Bloat" from all my aquariums in the past several years. I don't believe they are necessary to produce great color and healthy fish; however, I did notice more frequent spawns when I did use them.