Ffof soil with trio nutes. Purp Kush auto's. Day 60 from seed. Week 4 of flower I think. Battled heat and humidity but now better. Feed every other watering. Brown spots don't rub off. Used calmag to fix. No deal. Stopped calmag to fix. No deal. Ppm as of now are 1200. pH has been a struggle but finally up to 6. Tap water set out 24 hrs. Any advice welcomed.
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you have to correct pH first and foremost. Then nutrition can be used by the plant.
The CO2 will only work if your light supply is high enough and the light is consumed by a healthy plant. The app mentioned above can help determine how much light you’re supplying. Otherwise, you could be supplying more CO2 than the plant can use.
clip any leaf that it touching the grow medium, is in the shade, is blocking a bud growth site, or is necrotic or so chlorotic that it isn’t functioning properly.
knowledge is easily gained. Asking questions is a great start. Reading books and watching videos are another sources.