I would like to know how regularly and how much Ca/Mg to use with my regular General Hydro nutes using RO water. Or should I only spray them with it when they show signs of needing it?
smileibiza Reviewed by smileibiza on . How much Ca/Mg to add as suplemental dose I would like to know how regularly and how much Ca/Mg to use with my regular General Hydro nutes using RO water. Or should I only spray them with it when they show signs of needing it? :) Rating: 5