all 4 of my yarrelli are healthy and growing fast...I waited a long time to get some and made accomaditions ahead of time to do so. If you've never read about them dont order it. Its just like any other rare specimen and needs some special attention if you want it to thrive. People who are having problems keep in mind these fish live in cold mountain rivers with extreme current and you need to recreate that or your done from the start. Mine are in a 65 with canister filter, ac110, uv sterilizer, powerheads and no heater. Their next tank will b a 230 then 650. I even switched to l.e.d. lighting because my regular flourecents were making the water to warm. I would never put this fish in a tank with others, its common sense because there extremly hard to come by. Wes im sorry if your getting some flack from people for these fish. I truely appreciate what you do and my fish came in, in excellent health and already take an array of foods. Dont give Wes a bad name for your mistakes, own up to it and learn for the future. I would sell almost every fish in my house to accomodate these guys....think about it? Wes if i had more $ id take the rest so they go to a good home. Thanks again Wes