dude ok i just read some more of you shit stop with the cal mag shit ur going to start a lockout issue if its not a problem already. cal mag from my reasearch and experience is, it rarely is needed at the begining of veg and normally i only introduce it to mine about two weeks into flower and stay very light with it. cal mag dificeincy is when the leaf yellows normally at the top of plant first , the leaf yellows and the viens stay green. the silica is good stuff just stay light on it sometimes plants dont need a constant supply of those extras. instead try introducing it and stages and then leaving it out for a few weeks. i try to time this with growth like when flowering, buds grow in spurts about 3-4 weeks in and the last three or 4 weeks, thats when u hit them with those little extras to deal with the up kick in growth. and i change my buckets around every two weeks. if i had a res i wouldnt change buckets just res every two weeks. water is your current water temperature? try to keep it in the 60s a little less shit grow in the 60s than the 70s trust me.