The Koi since last fall( mostly for the grand kids to watch plus provide feed for bass) & the Talapia since May. It is floating because the pond has dropped about 10-11 inches, normally about 3 acres but only about 2 1/2 now. The Alkalinity was 30 back in May, Have been liming all year. 3 dump truck loads shoveled in, about 12 tons.
