I've only had mine for two weeks, but I can't praise them enough! I have mine in with a GBR, Honey Gourami, furcata and gertrudae rainbows and rice fish. I've never had a more personable fish other than a female betta! I was amazed at how sweet and friendly this gudgeon is. They must be the best kept secret around. They are hardy. I keep mine at 80-82F and even though some people say they have to feed theirs live or frozen or they won't eat, not true of mine! It has eaten everything I've put in the tank. Pellets, flakes, mysis, brine shrimp, Emerald Entree, krill, freeze dried beef heart, tubifex,bloodworms, daphnia, and a few things I can't remember. They are a bit strange looking, but colorful in a very subtle, pleasing way,and I've never been so impressed with a fish, and don't believe I'll ever be without one again! You won't be disappointed.