Hi! I'm new to the growing scene and I noticed some yellowing on some of the tips of the leaves on one of my autoflowers. I have a 1m x 1m x 2m grow tent with a Fecida cr600 (125w) led light. I also run an extrator fan and I have a small oscillating fan running on the floor of the tent. I run a 18/6 light schedule. I have 2 plants growing in coco coir 75% perlite 25% mix in 2 x 15 liter fabric pots. The nutes I use are Coco A&B , Rhizotonic and Cal Mag I am growing one Y Griega CBD plant which seems to be doing really well and a mystery plant which is either a. Blue Dream Auto b. Kush n Cookies CBD or c. Expert Gorilla Automatic The seeds got mixed up and only one of the 3 sprouted but which one I'm not sure. Anyway it's the mystery plant that has yellow tips appearing on some of the leaves. Both plants are on day 25. The Y Griega CBD is 18cms tall and the mystery plant 12cms tall I had the lights at 60% output 50cms from the plants and I noticed some slight burning on some of the leaves so I raised the light to 70cms, still at 60% output My feeding regime is a bit unregimented but I feed them both approx 1 liter of water each with 75% recommended dose of nutes each per day and I also foliar spray the leaves with rhizotonic 2mg per liter and calmag 1mg per liter once or twice a day. I always check the ph is at around 6. Humidity is always between 45 - 65 and temps 21-24 degs. The first 4 photos are of my mystery plant and the final 3 photos are of my Y Griega CBD Plant. So any advice will be gratefully accepted and also if someone could identify my mystery plant that would also be great. One other question, in photo no. 7 are they the dreaded nanas I've been reading about appearing? Thank you in advance.