House & Garden Hydro A & B is a totally complete two-part base nutrient designed for hydroponics gardening. 

Contains all of the various elements commerical gardeners use to ensure the optimal nourishment of the plants.

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

When preparing the nutrient solution, fill it for two-thirds with water. First add A then circulate well. Then add B and circulate well. Adjust the EC-value - start of the growth (1.2) increasing schedule end of growth (2.0). Adjust the pH-value of the solution with pH- (Down) or pH+ (Up) (5.7-6.7). See label for more information.

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