I've been reading this thread and other info I can find, and I'm making preparations to use alum in my pond. I bought a pool test kit today, and the ph tested above the 8.2 max in the kit. I made a secchi disk and measured 18 inches of visibility. I also filled a quart jar with pond water to observe it for a few days. My pond is just shy of 3/4 of an acre, with an average depth of 6'. Lastly, I'm in the process of locating a local supplier of alum. Based on the info I provided, is it possible to determine how much alum I'll need? If I need to treat a gallon of water to see how much alum, where do I buy a very small quantity to test with? (I'm planning on monitoring my ph during the application and having lime standing by in case I need it) Thanks in advance for any advise you can give me!
