4 in 1 Clarifier makes every sanitization system work better, including bromine, Baquacil, ionization and ozone. Your total chemical bill will definitely be lower. Use 4 in 1 once a week and you can stop using metal sequestrants, filter cleaners and costly enzymes. Your sanitizer will last longer, your algaecide will work better and you'll shock less often. Packaging: Bottle Dosage: 1oz. per 5,000 gal.