Pond Boss Forums GENERAL QUESTIONS Water chemistry Is AG lime just crushed limestone rock

I believe Ag Lime has to have 95+% pass through a #60 mesh screen. Each state also has a legal minimum on the calcium content the Limestone must contain to be legally called Ag Lime. If a quarry does not supply Ag Lime, it is ONLY because their rock is too low on calcium content.

Snrub is spot on that the finer the grind, the better it amends soils and water