Fairly easy. Regular water changes to keep bioload in check. I would say the hardest thng about keeping these types of fish is tryng to get it on a captve diet. The fuzzy dwarf is the easiest to convert and I hear the fumanchu is the hardest. I would go for a Fumanchu if ur lfs carries live ghost shrimp or guppies maybe even mollies. I Feed every other day. Chopped squid, silverside, mysis, and krill. I've been reading that krill shouldn't be fed to often as it can cause lock jaw and other digestive compications.