yes mixing is the big problem with both nova and maxi powder,, but both are great nutrients, ive never thought they wer missing anything,, not like advanced,, ive always thought that was definitly missing somthing ..but back to maxi n nova i have added cal-mag in a few cases growing larger 6ft plants but in sog ive never needed it..i also keep using the grow till the 3rd week of flower or i get early yellowing..1st week in bloom 1tsp per gal grow,,2nd week, half bloom half grow, somtimes a bit more grow if needed, 3rd to 5th week straight bloom,week 6 up ppm straight bloom, 7th n 8th week bloom plus kool bloom then i try to do a 3day minimum flush with kleen,, i love that it flushes plants wile cleaning the rez and flood table of salts at the same time.. making clean up as easy as wiping it down and spraying it off with hot water or a few drops of bleach to sanitize..