There is no specific set of Rife frequencies for Dwarf Gourami Disease, but there are two sets of frequencies for arthropod disease,
Arthropod Diseases 60 850 7800 (sq 2500 5250 2750-9 4269 5710 8290 9374-1) Hz
Arthropod-Borne Encephalitis 150 230 600 950 7500 (sq 1508-9 4553-4 5275 8965 9172) Hz
Combined,
Arthropod Disease Including Encephalitis
These may not work for Dwarf Gourami Disease but no harm trying.
Good grief.