Is it calmag or something else

What is going on I just switched it over to flower never had it till about a couple of days ago


I don’t know a whole lot since I’m new to all this, but it does look like a magnesium deficiency to me. Google cannabis deficiencies and there will be images to come up showing all the different traits. Good luck

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Same here. Looks like start of magnesium deficiency assuming your PH is within proper range. Soil 6.2-6.8
You might want to start adding about 1 tsp (5ml) of epsom salt to your water each time.
Without more details on your set up that’s about as far as I can go with this.

It’s only on the new growth which I just read is iron deficiency so I flushed it with water pH to 6.21