is it okay too use calmag & nutes coco anb together with ph'd tap water at 6.5 in coco plus medium?

You can but I wouldn't add too much unless you start seeing problems

Well these 12days in from clone about 10inch tall been fed twice with nutes at 15ml coco a n 15ml coco b with calmag 5ml mixed into 2gallons of ph ajusted tapwater to 6.5ph n been watered with plain ph water inbetween humidity is 50% and temp at soil level is 25c n gt fan on em n seem pretty fine now.