I grow in coco only.
i have soft water 0.2EC.
I use DUTCH PRO GROW HYDRO/COCO along with canna mono Ca.
my EC is upped to 0.4EC with the cannaCa then I add enough A and B of the Dutch pro grow to get to 1.2-1.4EC and I feed every single day.
I’ve used enzyme products, mychhorhizae, trichoderma etc. It’s all pretty pointless.
the best advice I can give you is use straight coco, feed every day once your plants are established enough to take it, make sure you add the extra Ca, most nutes have enough Mg in them to sustain a full grow, pH at 5.8 then reap the rewards.
this is under 400w and I’ve got 1 plant atm and a auto flowering plant.
normally I grow 4 together.
I used to buy into PK boosters, enzyme products, fungi products, silica products etc.
enzyme products are only viable if you wish to reuse your coco imo.