over or under feeding

Hi, First time grower in Coco. I'm using Canna coco Pro in 30 Litre fabric post. I'm using Canna coco, Rhizotonic and Coco Cal. I have a 1.2 by 1.2 by 8 foot Gorilla tent with a Adjust awing Avenger shade with 2x Philips CMH bubs. Running a 18 veg cycle during the night with temps from 23-26C. I...