OK, I said #50 alum, the math says to add #30 , but is very vague.My guess is that you will end up adding the 50. It also says to add #20 of quicklime before doing the alum, just as I stated, due to fact that you already have acid water. The 2 tons ag lime is not overkill and will look like a small amount when applied. It is very heavy crushed and ground rock. I see a lot of pines, therefore you will always be battling acidity. The more ag lime you put down, the longer you can go without re=applying it. Nearly impossible to add too much. Note that I said the 2 tons goes IN and AROUND the watershed.......Just go for it. My pond is near McComb, so very similar with acid. I used 100# alum and #60 quicklime. for about 4 acre ft. 25 to 30 may do it for you. If your visibility is 6 to 8 inches measured with a white coffee cup.
