I did my applications when the water temp was between 40 and 50. I feel if I waited until later, the FA would interfere and gum up the works, so to speak. My first application was at 40 degrees, second about 43 degrees, and the last and by far the largest application was at 50 degrees. The first application of maybe five pounds stopped the leak I had through a filled in drainage ditch in the dam in 40 degree water.
I think if I tried to apply it in summer, the FA would catch most of the Soilfloc and keep it from being very effective. The additional step of treating for FA would have to come first. BTW, the lowest temperature we had all winter was 11 degrees F and it was very brief. Only a skim of ice ever appeared on the pond all winter, and the coverage was never complete.
