Double check, but I think it has to be mixed on the front side of the levee (inside on the pond side, not on the side where its coming out).

I've seen it spread over the soil surface at the recommended pounds per square foot, then rototilled in. I don't know if a shovel will mix it in well enough.

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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).