CNS17 Original Hydroponics Formula is a highly concentrated, economical fertilizer that produces premium results for both commercial and small scale growers. CNS17 is an element rich plant food, with seventeen essential elements, and is ideal for producing a wide range of vegetable, flower, and fruiting crops grown using hydroponic methods. CNS17 is effective in: Rockwool, clay aggregate, Perlite, and peat moss as well as hydroponic growing methods including: top feed drip, ebb and flow, aeroponics and nutrient film technique.