lol... '.:karma:.0.o'?
All right Nalani let's get your system explained- is it a pure coco system? What TYPE of hydroponics is it?

The correct style of hydroponics that involves Coco is a hand-watered or drip to waste. Recirc can work, but can also be difficult to maintain. What is your style?

Tell us a bit about your watering schedule, what the criteria you used to set that schedule are? Does your coco ever dry out fully, or does it stay quite wet all the time?

What brand of coco is it? I see long fibres and that is good. Did you rinse it before putting in plants, or did the package state that it had been pre-rinsed?

Have you ever flushed it out well with clean water?

I very VERY strongly recommend either going to a coco-speicific nutrient system such as Canna Coco, or adding CalMag to your nutes. I'd lean towards the coco nute because it solves not just the Ca scavenging issue, but also buffers your medium correctly.

Edit- I still have yet to be convinced that you actually have a problem there, lol! The plants don';t look sick!