1st grow in canna coco coir! autoflowering

Hi, just got a 100x100x200 tent with 400HPS, 5' extractor and about to start my first grow in canna coco coir! Bought a HM digital EC-3 meter and PH meter too. Because It's my first grow in coir I'm not sure about feeding schedules and how to use fertilize. I've got canna A+B, canna bioboost, canna boost eccelerator, canna pk13/14 and plant magi CalMag.my tap water ec is 0.4 could you help me guys with feeding schedule? Can I use all fertilize together? How to know how much of each to put in and keep ec and ph level right? Going to start with autoflowering +speed seeds. Thank you!