Soooo ... after extensive research into nutrients in coco, overfeeding my plants, getting EC meter and seeing my plants respond good to lower nutes amount all is well now .. well almost.
Plants are 30 days from seed and I'll post some pics later when light comes on.
I'm a firm believer into mixing your own nutrients. Also ppm is completely misunderstood and misused. EC is helpful for quick mix but you rely on manufacturers to not to mess it up on ratios .. you just have to remember P and K are listed as P2O5 and K2O and already enough to confuse consumer. I will try, hopefully with help of other farmers, to figure out specific element uptake.