Our Complete Tank System is a simple and effective all-in-one solution designed to support vibrant coral growth, strong skeletal development, and overall tank health. Part 2 of a simplified and effective all-in-one solution to adjust Alkalinity and add critical trace elements. Alkalinity is an important parameter in saltwater aquariums, acting as a buffer to stabilize pH, and support coral growth and metabolic functions. For the reef hobbyist desiring a simple, practical and cost-effective method. This product is intended to be used with part 1 of the system, but can be used separately as well. IDEAL ALKALINITY LEVELS Suggested tank alkalinity levels for our product is 7-8 degrees of carbonate hardness (dKH), and 8-9 dKH as the upper threshold.