I'll go with the assumption you have a bullhead issue. Since you already put $700 worth of fish in it you are basically in the same boat I am in.
My plan is to thin them out until the bass can take over. To do that I run four 1/2" mesh homemade cloverleaf traps with an assortment of baits. I also have four 1/4" mesh traps for the bullhead fingerlings, and a dip net on standyby in case I spot one of the "balls" of fry.
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