It’s on my grow out system which is three 50 Gal bins plumbed together, so a 150 I guess. For the bio load it’s a hair undersized but that could also be due to the lack of flow and how long I run the lights. It’s definitely working. Just not as fast as I’d like to see. The first month or so I had it on there it cleaned my sump up pretty good. The next month or so it cleaned one of the three bins almost perfect. And now it’s moved on to the next bin. So it’s working. Just not super fast. But then again for that being the only thing I’m doing to get rid of the algae I’d say that’s pretty good. I haven’t changed my feeding and I rarely remove algae by hand. Just don’t have the time lately which is why I employed a new method of filtration. To give you an idea of bio load; I have 2 triggers, 2 tangs, 4 clowns, 3 damsels, and I’m pretty sure there’s a couple gobies in there that I never see but a couple times a month. I feed once a day with pellets and frozen mysis. Definitely over feeding but I didn’t want to change anything after adding the ATS. I can say with confidence that it’s working. Hope that helps give you an idea how to size it. What size of tank are you putting it on? You can always adjust how long you leave the lights on and how much flow to put through it. I’m definitely not running it to its full potential either.
