I filled a gallon glass jar from my forage pond two days ago and let it sit in the garage for two days. It still looked like limeade this evening, so a few hours ago I put three teaspoons of USP Alum in it and stirred it in vigorously. It hasn't cleared one bit, so it must be a plankton bloom. Visibility is a max of about eight inches. There are thousands of FHM and Gambusia in that pond. How do I clear it without a D.O. crash?