If you never had straight bluegill, or they have been eliminated/crossbred out, then no, it can't balance.
There is an article in the current Pond Boss Magazine about "transferring" fish. Not as cheap nor easy as it sounds once time and fuel are thought of. Plus if you're not an expert at identifiction, you are never sure you are getting the right fish. It takes several hundred fish of the right size/species.
In my case, my DOT cert was pulled due to a recent illness/allergic reaction that had me in the ICU for 8 days and nearly killed me. It did quite a bit of heart/lung/liver damage....it all appears to be healing/regenerating well now.
