This is very intersting, exactly what i've been looking for actually, you see i've been growing tomatoes with MHPgardener's masterblend/cal-nitrate/mag-sulfate formula for the past couple of years with amazing results and a friend recently approached me about growing cannabis hydroponically after he botched up his recent hydro grow by messing up his fertilizer ratios (had like 7 different bottles), and i immediately thought why not try this truly magical formula for cannabis? i mean its so simple to mix, as i hoped it looks like it preforms just as well as with everything else...
is the koolbloom really necessary though? i'd like to keep it as simple as possible for him, as he's not very good at this..
also are you growing in a DWC setup?