Ok guys I'm back.
Took some time off posting while I sorted out the problem. Took a month as it takes a while to try each variable out and see what improves or not.
Turns out all of this problem is caused by calmag. Back when i joined this forum I had 14 years growing experience with almost all success and had never even bought or heard of calmag. Then during my second journal someone suggested I must use calmag. Ever since my grows were shit. Well take away the calmag and recovery is going great. Put it back even at 1/4 recommended dose and within a week plants look terrible again with slowed growth. No calmag means greener, no more root problems and fast growth again.
So, any of you with weird problems that people tell you require calmag be careful with that.
Have now stopped the calmag and things seem to be going very good.
I had even bought a second bottle of calmag before in case first bottle was defective. Still fucked my plants hard. Take it away and they recover.
Here is how they looked last night. Just switched to 12/12 today. Let's see if I can finally do a proper grow again before 2 years was ruined fucking around trying things when it was just unhappy with the calmag.