If you go with coco, make sure your nutrients are good for coco. Fertigate from the off at about 0.6-0.8ec. Start to fertigate to run off of 20% in week 3. Should only need to water every 2 maybe 3 days until then.
Good luck,
EP3
yeah id second all this advice too.
(To OP) If your sneaky you may be able to get away with the nutrient line you are currently using, however if you do want to keep using it ensure you go with a nice brand of prebuffered/prepared coco coir say from CANNA instead of going with the brick form then you can guarentee its free from salts and buffered correctly, itll be less likely to fuck up than say a cheaper product in brick form.