Learning coco coir!

Ok so as expected growth is at minimum. I know it usually takes a few days to come back from topping, but this can’t be the speed of growth in coco coir, it would take me months to match the size of my autoflowers in soil. I’ve done a lot of research on the subject and I’ve hit a brick wall, I have changed coco coir! I changed to a complete line of nutrients (advanced nutrients), I’m checking PH & EC though I don’t need to. Ph is always between 5.8-6.2 I’ve replaced my lamps 600w metal halide-veg, 600w hps-bloom, and added 200w cob led. I have a heater on an auto therm keeping the room at 25c during lights on, 20c during lights off. I keep a humidifier on all the time, humidity is the least stable as it has always been. RH50-75% the humidity without it is 35% but only if I have forgot to refill the humidifier, which has never been an issue before. I think I’m going to mix 50% coco coir with 50% biobizz all mix in my next grow I’m wasting my own time with this at the moment. There has been some growth over the last 2 days :) and she looks to be in good health, I’ve cut back on the nutrients at the moment, only watering with root stims and vitamins. I may have stunted her. Defoliate and started training