Looking for some help with biotabs grow

[Flyfish]

Hello, I’ve been successful so far with a Mephisto sour gummy bears grow with biotabs! They are in a 12l pot with biobizz light mix. I have 2 tabs in the pot. Long story short, they are at day 40 with nice fat buds and dark leaves, slightly nute burned. I water with ro water and calmag at every watering. So far I have added coconut water, recharge and a small dose of build a bloom from build a soil and their big 6 micronutrient pack. Currently backing off adding any more nutes. As far as the calmag do you think I am overdoing it? Should I actually use it with every watering? I’m afraid of messing it up as I can see some light spots starting on some of the fan leaves. I’m only adding 1-2ml per 1.5l of water. Any help or advice anyone could give would be much appreciated.