Hi. This is White Widow Auto from ILGM.
I ph water to 6.8. In 5g air pot with roots organics soil, new HLG135RSPEC, humidity 65% temp 75F, almost month old. Nutrients cutting edge solutions base with bulletproofsi.
Not sure if this is a light issue or lack of magnesium. I used calmag and doesn’t seem to be getting better. I’ve been using half the recommended nutrients as it was still small.
One other thing you might consider: Microbes and bacteria can help the plant use the nutrients you give it regardless of brand. Real Grower’s Recharge, Mammoth P, as well as others.
Adjust pH of your water then add microbes. Don’t worry about water pH after adding microbes to it. Don’t store water with microbes added for use later. Mix what you need and if there’s any left over after getting slight runoff water the houseplants or tomatoes. They’ll love it.