This is prepared according to the standard formula of the British Veterinary Formulary for fish prescription.  That means we use only the best quality Methylene Blue B.P.C. which is the same quality used in Hospitals and Veterinary clinics.
 

Effective Against:

Ectoparasitic and fungal infections, and prevention of egg fungus.
 

DIRECTIONS: 

By prolonged immersion -- 5 ml to 25 litres. 
Dose may be doubled with care.
 

CAUTION:

Toxic to scaleless fish. 
NOT to use with Biological filters.