Ag lime takes a while to work. The finest particles and the surface area of the particles do the initial quick work, but the coarser material takes time to neutralize the acids.
That is why the finer the grind, the quicker the action. Coarser stuff acts more slowly but tends to last over a longer period of time. After all, it is only ground up limestone rock.
I'd give it some more time.
On the other hand, it is very hard to get too much lime, so if you feel the need to add more, it probably will not hurt much and will just add to the buffering capacity and life.
Not an expert, and the opinion is based more on 40+ years of farming dirt rather than pond experience, so listen to the pond experts if their opinion differs from mine.
Last edited by snrub; 09/14/14 11:32 AM.
