House & Garden Aqua Flakes A & B is a two-part base nutrient designed for RE-CIRCULATING hydroponics systems. 

You can use this liquid nutrient duo with expanded clay pellets, Rockwool/Steelwool or coco coir.

Aqua Flakes A & B nutrients provide your plants with high quality nutrition during both growth and flowering periods. Contains all macro and micro nutrients needed for your garden to thrive.

Completely water soluble, Aqua Flakes A & B encourages the transfer of nutrients from the root zone into the foliage. Application rate may be adjusted for normal or aggressive strengths. See label for more information.

Derived from: Calcium Nitrate, Ammonium Nitrate, Nitric Acid, Potassium Hydroxide, Phosphoric Acid Anhydride and Magnesium Sulfate.

As with all House and Garden nutrients, Aqua Flakes A & B is extremely concentrated so a little goes a long way.

More info (PDF format)