If the FA is the only cover in the pond for them to hide in, then you will see increased predation on the YOY fish. If applied according to the labeled rates, the chemical itself should have no effect on the fish. If applied in excess of the labeled rate then you could see some mortality from it.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).