Hi
@ponic_farmer! The pink grow light makes it hard for us to diagnose anything, but here are a few advices for you: 1/ there's too much wind in this room! I think you're stressing out your babies with such a powerful breeze, try to increase the distance between your fan and your plants or decrease your fan's power. 2/ they will start to ask for Phosphorous and Potassium (P+K) and you will need to stop Nitrogen intakes right after the stretch has ended. I know this is impossible in your current setup since you're using an all-in-one fertilizer, but I'd recommend to find a good PK booster with no N to make sure you're not overfeeding with Nitrogen. 3/ pH fluctuation is a good thing, if it's correctly done. You can move your solution's pH by 0.1 everytime you feed, if you're in the correct pH range (6.0-6.5). This might help the plant to handle different nutrients absorption and prevent from deficiencies. You're doing fine, I'm confident you'll be rewarded with a great yield. Keep us up-to-date, and happy growing 👊