Where is your PH now? And from my experience I would stay with Rainmans recommendations. When I treated my pond (3+ acres) with 2 to 1 ratio the pH did not change much at all. The alum is an acid and will drop the pH, the lime will keep it around the 7 range if it is mixed and added correctly. Hay, I am no expert but passing along my experience.
Do not judge me by the politicians in my City, State or Federal Government.
