Seachem Arowana BufferAdjusts pH to 6. 5 Creates ideal environment for Asian Arowanas Softens water Enhances immunity Arowana Buffer adjusts pH to 6. 5 from either a low or high pH and maintains it there for 24 weeks. It safely softens water by precipitating calcium and magnesium. It also supports the ability of arowanas to resist infections. It is the buffer of choice for conditioning water for Asian Arowanas. Directions: Use 1 level teaspoon for every 40 L (10 gallons)