Mould ?

Ik zou liever hebben dat je je plant preventief behandeld tegen meeldauw. Het is een samenstelling van water en melk, je doet er niets verkeerd mee. Zoek even op het internet de gedetailleerde informatie op, "behandelen meeldauw". De bladeren die te zwaar aangetast zijn, moet je verwijderen. Beter om zeker te zijn🙂

Keep in mind the Calmag also has nitrogen

No. I dont see any white powder spots. Going you say something more tommorow guys.

The all mix is already quite well-fertilized on its own, so you can usually go for a while with that. When it comes to nutrients, you can't go wrong; keep giving the Biobizz nutrients until "the end" -> include flushing for the harvest if there's a nutrient surplus. Normally, you don't need to flush frequently or at all with organic nutrients, unless you had some issues. It does look a bit like powdery mildew in one photo, but I can't say that with 100% certainty. Did you see any white powdery spots that you could wipe away?

I going to check water tommorow*. Sorry 😂

Soil biobizz all mix, also use biobizz nutrients - grow, bloom, topmax and calmag. Its second week of flowering and I still used grow nutrient - about 1,5ml per litre. pH meter calibrated week ago. I going to check run off water yesterday

Can you tell me what medium you are using and what nutrients and the amount of nutrients?

I would check first the PH and the PPMs on your run off water. I had a problem with calcium deficiency just because the PH pen wasn't calibrated and was around 5.3. If those values are ok then I would stop adding nitrogen for a while and see how is the new growth

You mean I gave much nitrogen nutrients ? Should I use only water on next few waterings ?

If you are using soil or coco check the PPMs and PH on the runoff water

Looks like nitrogen toxicity