I water when I feel the pots about as light as a pot with just coco no water.
That's a problem. Coco is a hydroponic medium. You can't let it dry out between waterings like you (must) do with soil. Even when it seems "saturated" coco holds enough air to maintain healthy roots. You can water every day. Some folks do it twice a day.

If you've parched your roots, the damage may be irreparable. Are your other plants in coco as well?