Watering/coco/curled edges

[Mooregrow]

Hi guys could really do with some help.
So I messed up basically

plants where growing fine all apart from one.
That one had stopped growing and leaves became wavy and the edges started turning up. There was also salt build up on top of the coco... iv just ran ph 5.8 though till runoff... because i wasn’t watering till runoff hence my fuck up. I done some digging and the fabric pots where dry half way down so hopefully it’s all wet and I can carry on how I should have.. my question is there’s still salt specs on top of the coco??? Do I need to flush it again?

 

[Mooregrow]

The reason I did this was because the other plants started having the same symptoms

 

[Jman108227]

Hi there. I can't help you out for a few years, but I can let you know someone will be able to help you better if you take pics without the purple light on. Good luck

 

[Mooregrow]

It’s dark in the roof no other light but yeah thanks anyway

 

[Sensubeans]

It’s dark in the roof no other light but yeah thanks anyway

How'd ya go bro did you find out the problem how did ya go with watering till runoff?