Marineland 125 gallon reef ready tank. I got it from a local reefer family. I drained it and hauled it to my house. Don't think I'll water test it since I drained it and adopted some of the fish he had. But the Caroline algea I tried to remove what I could for hours on end. It was 90 percent worse than the picture below. Now to figure out how to get my sump in the stand.