Hey man, When you commented about using 5ml/gal cal mag for clones and 10ml/gal for established plants, were you referring to Botanicare's Cal-Mag Plus? The guys at the hydro store told me to buy it when I picked up my RO, and have been using 5m/gal and things seem ok... But I am relatively new and after some research I found that maybe this is mostly for soil... I am using Flood and Drain for both veg and flower (table then to bucket system). If you have any tips on the calmag I would really appreciate it! This stuff is expensive and I don't want to waste it. Some people say it should only be used with botanicare products? Also the bottle says pumps and air stones may remove the iron?