I'm having a ruff go with FA right now as well.. Sucks.
I have done some small treatments with CS on riprap areas for 3-4 ft out from shore, using about 2 oz per gallon dissolved and noting little difference.
My concern with CS is Phyto is not the only planktonic growth it kills.. it can smoke the zooplankton that clean up the dead FA and smaller phytoplankton. The zooplankton is the fishfood desired for new YOY, I'm concerned about stressing that side of it but am shocked at FA coming on.
I treated pond in mid April with 300lbs alum and 100 hyd lime hoping to lock up what extra Phos I knew came in with the snow melt run-off with frozen ground. Been an up and down cycle the last week. Clear 1 day, pea soup the next.
For fear of jacking it up even further I'm going to stop any more CS use and see what happens.

Last edited by Snipe; 06/16/19 11:39 PM. Reason: spelling