If the pond isn't aerated, and you want the fish to use the cover during the summer, is all of it in shallow enough water so it's above the thermocline? If the pond is aerated, then nevermind. wink


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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).