Morpheus

Dwc can be a pretty temperamental way to grow. The water has to be kept cool and pH is hard to maintain. General hydroponics maxi nutrients are the most stable nutrients I have found. I really think you have a combination of light burn and pH issues on her. I use ladybugs to deal with pests. They clean out aphids and mites pretty fast. Hope you can get it turned around. Good luck!

hey there morpheus , hope I answered your question you have classic magnesium deficiency symptoms , your healthy plant probably just stretched too fast for its own good. Anything else you need just let me know ! :facepunch:

You are using a lot of magnesium and I don't see any calcium in your feed schedule. Magnesium will lockout calcium if you use too much. Calcium helps deal with heat stress. I would say light burn. This is a great reference with some pics that look like your plant. Good luck and happy growing!:four_leaf_clover::muscle: https://www.growweedeasy.com/cannabis-light-burn

Thanks for the responses :) Have now added 5ml of calmag (10l reservoir). Giving it an hour to mix, then I'll rebuffer the pH. Fingers crossed!