thanx peeps. i was reading the famous LUCAS old forum. i think one of you guys posted it in the thread somewhere. anyway he believes that no additives are needed and that optimum levels can be reached just by correct lighting, temps, humidity, pH, and using just his LUCAS FORMULA. i think i may just do that. not sure tho. u guys should read his thread, its long but filled with lots of info on hydroponics. very amusing also.
dl- ive heard good things about cal/mg like it hardens the buds and gives for extra dry weight but some bad things too. like that it does nothing and that 2 much can cause nute lockout so be careful using it. LUCAS believes that just by adding micro nutrients in good quantities it provides enough of all this extra stuff that people tend to buy as supplements. maybe you should just try adding micronutrients first and then moving up to cal/ mg if it doesnt benefit you.