1 yes. More than that? I'd be worried that they would spawn. The SMB will have a hard enough time keeping up with the YOY BG. I think that will be even more difficult if they are slurping up YOY Koi.

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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).