C-balance concentrate must be diluted with water to complete the product, The gallon container arrives to you half full so you can add the water to the gallon to make the solution complete, This two-part calcium and alkalinity maintenance system adjusts calcium magnesium and strontium ions to Natural Seawater ratios and achieves a balanced ionic residual, Makes replenishment of calcium and alkalinity easy and keeps your calcium and alkalinity in perfect harmony assuring the optimum conditions for growing stony corals and coralline algae, C-Balance can be used as an alternative to Kalkwasser or as a supplement to it, Treats up to 15 222 gallons of water, SKU: RYLHC6464