I have one in my 75g fo tank and those bright colors really stand out. Make sure your tank is stable and has been running for about 6 months. It's very sensitive in a new tank. I had one the second month my tank was running and it died. The new one has been strong for the past 3 months. Also, I wouldn't get one if you already have a dwarf angel in your tank. They'll end up killing each other.