Californiapetpharmacy.Com has it on sale for .90 per 200 mg tablet. I did not look at what the dosage is for treating fungus.A friend of mine who is studying to be a vet said that the fish fungus medication ketoconazole may also work, and would be a less stressful medication on tank inhabitants. I don't have any Bryopsis anymore. Maybe someone might want to test ketoconazole vs fluconazole. Ketoconazole is now less expensive vs fluconazole since everyone is buying fluconazole.