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Well I gathered my self up and removed the plants away from coco altogether except one, all 5 are now in bubbler so its much easier to control and watch their progress from now on.
As for the roots they were fine nothing wrong with them maybe a little small for their age.
As the other posters stated pure coco does have its share of issues, hand watering will make sure you are not water logging the pure coco. Whenever you have poor drainage and aeration it takes much longer to fix issues.