This week I was getting reading for a printing session. While diluting Dektol I found debris in the stock solution. It looked like algae growth you would find in stagnant water or a poorly kept swimming pool. It would float and settle at the bottom of the bottle, sort of like dust, but larger. The Dektol was mixed in November from powder using city water. It was stored in a used 2 liter pop bottle which was clean. I have been doing this for many years using the same source of water without issues like this. It was not the precipitate you can get if the powder is not fully mixed. I always mix at the temperature on the package in a dedicated one gallon plastic mop bucket. After cooling, I pour through a screened funnel into used pop bottles. Any ideas as to the cause? Bad water?