About This One gallon of Mineral Blend A One gallon of Mineral Blend B Follow Instructions when blending. This is only for Tower Garden growing systems. Dedicated customer support and comprehensive growing resources to help at every stage of your Tower Garden experience. Let us know if you have questions. In general, you should mix 20 mL of Mineral Blend A and 20 mL of Mineral Blend B with each gallon of water you add to your Tower Garden reservoir. But there are a couple of exceptions: For a Tower Garden full of small seedlings, use half-strength nutrients (i.e., 10 mL of A and 10 mL of B per gallon of water). After about three weeks, you can increase the solution to full-strength. During hot months—when the water evaporates from the reservoir more quickly—use half-strength nutrients (or add full-strength every other time you fill the reservoir). Only Un-Opened Returns will be accepted. Customer pays for retun shipping. Overview Brand : Tower Garden Item Weight : 19.5 Pounds Item Form : Liquid Liquid Volume : 2 Gallons Specific Uses For Product : Plant Growth