Are they bringing the fish to the pond ? If so ask them to test the water before stocking as you think you may have an alkalinity problem. You can , if needed , put ag lime in a few days after the fish go in. However ag lime will not dissolve if pH is above 8.3. From SARC link "However, at a pH of 8.3 or greater, agricultural limestone will
not dissolve".

Last edited by ewest; 07/05/16 01:06 PM.