This dry formulation designed to create 25 gallons of concentrated stock solution. These fertilizer dry salts must be mixed in its entirety with 25 gallons of fresh water to create the stock solution. For example, if you need 50 gallons of stock solution, then 2 bags of dry salt mix would be needed to provide the 50 gallons. All mixing should be done incrementally at the 25 gallon measurement. Partial use of the dry salts are not recommended. Product mixing requires a mixing/agitation pump to solutionize the product. Warm water will also increase solubility. Once dissolved the mixture will not precipitate or settle out. Even though each fertilizer product is a different weight in the dry formulation, each bag still mixes to make 25 gallons of stock solution.