Alkalinity, as it pertains to aquarium husbandry, is essentially a means of quantifying the stability of pH; the greater the alkalinity measures, the less likely pH is to change. Adjusting and maintaining alkalinity to a value or range appropriate to the requirements of the organisms residing within an aquarium is vital to their long-term care; consult a reputable reference source citing these requirements prior to use of this or any other pH- or alkalinity-altering supplement. Do not add this product directly to an established aquarium without first diluting in water as directed, and without first determining pH and alkalinity with an accurate meter or test kit. Read entire instructions before proceeding. Adjust alkalinity, pH, TDS, and temperature of the water prior to adding it to an established aquarium. *To increase alkalinity in systems with higher pH requirements, the use of Brightwell Aquatics Rift Lake dKH is recommended.