unclenedsfishfactory.com

I closed my 8,000 gal pond down last Nov. with a ph 7.8-8.0 and kh at about 120. All well and good. Only 10 1-3 year old koi. This last warm spell ice melted temp rose to 50 degrees. Fish seemed happy about it. Started just my skimmer to get a jump on spring cleaning.....The bad news.... Tested wate...