An all in one, non antibiotic, treatment that attacks a broad range of external fish diesases bacterial, fungal, viral and parasitic. Extremely effective agains fungus in ick. Uses the powerful oxidizing action of HaloShield to attack and destroy disease causing microorganisms. Offered in convenient, pre scored, dissolving tables to take the guesswork out of dosage. For use in freshwater aquariums. Each 1/4 tablet treats 2.5 U.S. gallons. Active ingredients 1 chloro 2,2,5,5 tetramethyl 4 imidazolidinone. Remove filter carbon and turn of UV sterilizer before use.