Liquid Marine Buffer will safely raise marine pH to 8.3 while adjusting alkalinity. It will not raise pH above 8.3 even if inadvertently overdosed. Liquid Marine Buffer contains a balanced blend of bicarbonate, carbonate and borate salts designed to raise pH and restore disrupted buffer systems to the proper balance. Use Seachem’s MultiTest: Marine pH & Alkalinity to check pH and total alkalinity. DIRECTIONS: Use 1 capful (5 mL) for every 20 L (5 gallons) daily until pH stabilizes at 8.3. (Note: The 2 & 4 L container’s cap is 10 mL). This may take from a day to a week depending on original pH, alkalinity and buffer system balance. Thereafter, use as needed to maintain pH.