Cal/Mag Deficiency?

Yes it's calmag deficiency, grab yourself a bottle of cal mag and add it to your feed 1ml pl per week. 👍🌱

@balansa, The main symptom of calcium deficiency is bronze or brown spots on your leaves, you have none therefore calcium is NOT the issue. Calcium deficiency is far less likely to happen when growing in soil, and if it does happen it is most often due to the plant not being able to access it due to ph issues, or root zone problems. @maconheiro, I looked at your diary and wanted to share a few things with you. Firstly you are at 70% humidity, at this stage of growth you want to be at around 55% because when your humidity is high your Vapor Pressure Deficit is lower, which means your plants transpire less, less transpiration means less water moving from the roots to the leaves, which can cause nutrient issues due to the slowed uptake of water. Lastly I saw your light height was 15 inches, i'd move it up 6 inches, LED lights are strong, and can easy cause light stress, leaves can be bleached by the intense light, causing fading, yellowing, and twisting leaves, eventually turning nice and crispy. So my advice would be to make sure your soil PH is 6.5-6.8, lower humidity to mid to low 50's, and raise the light 6 inches, You should see improvement in a few days. Happy growing.

Well I think it is a different issue all together. I see sulfur and magnesium deficiency possible. I would start with soil ph. Make sure that is in range due to run off test. If that is in range. 6.5 to 5.8 range. Then add what is missing. could just be going in and out of lock out range. Good luck and happy growing

the signs start to appear on the older leaves and the new growth is normal. also the yellowings on the fan leaves are shown between the vains so this is 100% calcium dficiancy