One important point totally missed in this thread...you aren't comparing 'apples to apples.' Aglime is naturally mined calcium carbonate, in ground form from stone. Its pH is something less than 8.2. So, that product cannot raise the pH of any body of water higher than what it is. Hydrated lime is Calcium hydroxide. Its pH is way too high, somewhere around 13. It is volatile, and artificially raises the pH. That's not the problem in ponds. Alkalinity is the problem. Hydrated lime cannot raise the alkalinity. Alkalinity is a measure of carbonates. So, to properly improve acidic ponds, aglime is the tool of choice.
