i'm just curious seems with all formulas if you supplement cal-mg it provides 2-3% nitrogen from calcium nitrate...., so i don't see the point in using any grow formula....all you should need with any 2 part whether dyna-gro, general hydro....or advanced nutes is their bloom formula + cal-mg you always end up around 5 to 6% nitrogen and don't have to worry about burning to me everytime i use cal-mg with r/o water and a grow formula i end up on the verge of burning any reply would be much appreciated i know the lucas formula already states this ...but i'm saying if you read the nutes analysis for almost all the hydro nutes...it ends up not needing any grow formulas