5-10 ml per gallon is what they recomend. A quart will get you past your first grow. But really it depends on how much water you use each time you change the rez.
Zandor Reviewed by Zandor on . Nutrients etc. Ok guys it has came time for me to order some goods for my babies. I have been using RO water and lets just say i can tell they need some CalMag bad. So i want to know how much do you need to add to RO water. i am trying to figure out how much i want to order at a time (quart or gallon. My babes are 10 days into flowering and have been recieving cactus juice. Should i change that up to something that is for MJ? Suggestions? Also any suggestions on some bud boosters?? Basically i am Rating: 5