Blain CUSO4 can be a problem. What is your alkalinity ? In low alkalinity (acid) water CUSO4 acts to inhibit gill function and can kill BG quickly. I re-learned that the hard way once. It should be diluted in water and be applied or put in a sack and dragged through the water. Should not be just placed in the pond to fall and settle on the bottom.

Last edited by ewest; 05/12/11 04:18 PM.