From Wikipedia: Fin rot can be the result of a bacterial infection (Pseudomonas fluorescens, which causes a ragged rotting of the fin), or as a fungal infection (which rots the fin more evenly and is more likely to produce a white "edge". So,
Pseudomonas Infections 60 230 8850 (sq 4525 1153 2153-1 4375 6625 8253-4 9170-3) Hz
and
Fungus Diseases 170 220 930 (sq 2750 1325 2555-8 4758-5 7249-4 8258-7) Hz
and combined,
Pseudomonas Infections And Fungus Diseases
Water proof the speakers (plastic bags) and dip them into the water.
Good luck.
