Keep at it. You can do it. I had Crappie in my pond and I was able to fish them all out. I am slowly transitioning my pond from a LMB pond to a SMB/HSB pond with Bluegill and RES. There will probably always be LMB in there, but every one caught that isn't tagged is removed, no matter if it is 4" or 20"+.

Target any LMB you see making a nest, and any adult LMB you see guarding a ball of YOY LMB.

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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).