So I did about a 70% water change a few days ago, and dosed again with GC. Seems that there really isn't any improvement in the Keyholes. Still some small black spots, scratching, and white feces. Any other ideas of what I can try?
Sorry to see you are still having problems but this has been a very educational thread for me. Interested to see how it turns out, hopefully to the good.
I wish I had a definitive answer here for you! It sounds like the MG had zero effect or may have even made things a bit worse. If you opt for copper, try Seachems Cupramine over copper safe- its more stabilized form of copper and hopefully should be a bit more forgiving. I am not sure salt will have any effect at this point as what your dealing with seems to be unaffected by actual meds. Good luck!