I know a lot of areas in Texas have low alkalinity waters. If you can find limestone, use that in the pond. Anything that will bring up the alkalinity will help.

There's a great thread in the archives on structure/cover for fish. Take a look at it if you haven't done so already.

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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).