In coco you need to feed and water til run off every day, its a hydro setup and must be treated as such. Do t treat it like soil or you will fail. Dont be worried about watering daily coco holds plenty of air for the roots even when fully saturated with water. Be sure to ph to 5.8, feed plenty of calmag and feed/water daily and ph water only once a week to prevent salt build up. Plant looks hungry as hell to me, needs more nutes for such, N starved.
Canna Coco is good stuff, its the only n ute i would use if and when i do coco.