Cal mag deficiency?

yep NPK deficiency but more over the P hunger

Not a cal/mag deficiency, but a phosphorous deficiency.

If you’re currently feeding with only half the recommended dosage, I’d suggest increasing the overall nutrient supply — especially phosphorus (P) and potassium (K), since your plants are now in a stage where they need those elements the most. The appearance of your plants — particularly the reddish stems and pale leaves — clearly indicates a deficiency. So, I would recommend either using your bloom fertilizer more frequently or slightly increasing the dosage. Raising calcium and magnesium levels could also help to some extent, but in my opinion, your main focus should be on optimizing the P and K supply first.

Hey 👋 I would agree to 100100… Looks more like a nitrogen deficiency. If you feed with BioBizz, add some BioGrow to your feeding schedule (like suggested by BioBizz). If you are using other brand, add some grow fertilizer.

looks more like a N-deficiency. calcium and magnesiu are 2 different elements and 2 different symptoms. mg deficiency will be interveinal chlorosis with spots calcium deficiency is just spots. This looks like paling from tip-in on leaf and bottom-up on plant -- advanced progression leads to the more severe damage seen, eventually. most people don't know how to water, so just in case: 1) fully saturate 2) wait for apprpriate dryback and repeat. if you are whimsically choosing volume of water or time between, you are doing it wrong. This should be an observation and reaction, not a top-down choice.