Seachem Alkaline Regulator 250g PH Buffer 7.1 - 7.6 Aquarium Fish Tank Water
Use 1 level teaspoon (5 g) for every 40–80 L (10–20 US gallons) daily until intended pH is reached. Thereafter, use once a month or with water changes as required to maintain pH. To lower pH, use Neutral Regulator®.