I have one on my 10g nano cause i got the whole fixture for $50. I have a zoa colony that is doing well but growth is slow, they are 5 inches under light. I also have star polyps and they are growing at the bottom of tank (10 inches). I have a few shrooms which seem quite happy at the bottom. My intention is to build a LED system to fit in the case after the next bulb change. It is not ideal but it is working, and much lower algae growth than my T5 main display.