Hydro A & B is a highly concentrated organic-mineral basic diet to be used in the growing and flowering phase of the plant. These two components liquid fertilizer contains all the trace elements in a high quality chelated (DTPA). This allows the plant may also be at an ideal pH value or optimally develop too low soil temperature. It can be used on all types of inert substrates. -Provides full control of power and pH values -Contains easily absorbable nutrients within a wide pH range -Highly concentrated, so economical in use -There is no crystallization occurs in the nutrient -Suitable for all watering systems Hydro A: Water, calcium nitrate, magnesium nitrate and potassium chloride. NPK fertilizer (5-0-2). 5% Total nitrogen (N), of which 5% nitrate nitrogen (NO 3 ) 2% water-soluble potassium oxide (K 2 O), (CaO 8.8%). Hydro B: EC FERTILIZER. Solution of NPK fertilizer (2-5-9). 2% Total nitrogen (N) of which 1.8% nitrate nitrogen (NO 3 ), 4.8% of water-soluble phosphorus pentoxide (P2O5), 8.7% water-soluble potassium oxide (K 2 O). Shake well before use. A maximum of 1.6 ml Hydro add per 1 liter of water (1: 625). Use in any dosage Hydro A same amount of Hydro B. Using this combined nutrient solution every time you water.