Coco disaster 4th grow

hey guys first things first thanks to anyone that trys to help
ok this is my 4th coco grow all have failed terribly and would love for this one to go right so i can get my smoke on im growing in canna coco pro 5 rp headbad aka sour kush plants with there whole line of canna coco nutes ,i am useing hard tap water with an ec of 0.6 , they are about 6 weeks old from seed i potted them up around 3 days ago and fed with an ec of 1.6 which includes my tap water ec of 0.6 a day later it looked like my yellow tips on the new growth had got worse and there was some sort of burning on the leaves so i flushed them with phed water till the ec ran of at 0.6 , today i have fed them with an ec of 1.0 including my 0.6 background also i ph my water at 5.8 and im getting run off of 6.2 im gonna post pics so you guys can have a look and hopefully a pro comes along and makes my day

wheres the pros at ????

let em rest after transplanting..... no light or very low light the first 12 hours. Plain water at transplant, then you don't want to over water...... they like a wet /dry cycle give em a few days between waterings.

well the roots are coming out the bottom now on all of them

these are from today

Hey rancher, check the accuracy of your ph meter or test kit with some 7.0 ph calibrating liquid.

Also don't let the coco get bone dry and when you feed, make sure you get good runoff every time.

i think i just found the problem there was not much air coming out my out take so i took my old dirty carbon filter of a boom loads of air started pumping out