Thank you @shag,I noticed I was suffering from calmag deficiencies during my last grow and I added more calmag this time.Needless to Say I have not experienced calmag deficiency like the last grow.Probably using gypsum and magnesium sulfate alone will help and work Better than having to use RO to remove calmag from my tap and working from 0.Instead,using gypsum and mag sulfate Will help me find a solution for using only my tap water(50mg Ca and 27mg Mg from municipal analysis average,but lot of Calcium and Mag carbonates,Total Ec of Average 0.4) and avoid to buy Ro filters again.
I Always got lockouts/problems because I have lot of carbonates and really hard water,I think Coco got clogged with carbonates that blocked absorption of other Ions and elements by the root sites