The FHM are just a band aide... I would stop paying for them because it mostly a waste of money.
When you catch bass, weigh them and measure them to get a good RW. It does sound like you have too many bass so take this advice:
I would immediately work on removing as many bass as you can. If you have use of electroshocking, all the better. Use any method you can to remove bass. If your lake is really 15 acres and not 25 and you had 2500 bass stocked, I would shoot for removing about 1000 bass.
When you have knocked back the bass, then you can start working on building your forage back up. Stocking new bream(BG) would be a waste of your money until the bass numbers are under control. What does your bream population look like right now with the electroshocking you have done?
Once you have the bass numbers down and are stocking more bream, you can consider stocking threadfin shad. There are several good threads on here on how to go about successfully doing that. If this pond is going to be for producing trophy bass, you may also want to consider stocking golden shiners as well.
Other than fertilization, what other management practices are you doing, aeration, feeding, placed(ing) fish structure?
