Greg you might be right but I have always wondered in Ag lime is cheaper. BTW I use Ag lime. Lets use my pond as an example 3.5 acres in middle Georgia. On average wouldn't a new pond of that size and location take 10-12 tons of Ag lime. What would some one charge to bring that out and spread it with a boat? On average how long would it last until you would have to reapply. I guess in seven or less years.
With hydrated lime if it took 10 50 lbs a year(yes I'm guessing)at $10.00 a bag(I checked) over seven years you have spent $700.00 liming vs the upfront cost which I am guessing is much higher.

Educate me where is my thinking wrong