Two questions: I am clueless about nutritions. i g...

Wat u have is a nitrogen diffency this is from not mixing your nutes right and your ph is falling off and lack of light i would open her up this happens at the bottom of your plant first and will cont up untill u fix it the problem with AN u need to use both parts are all 3 for your case they are designed to work together right now u cooking bread with no yeast🤔🤔it will only get worse if u dont fix it now✍️✍️✍️

Nutrient companies want you to use the nutrients so you have to buy more sooner. I've been using Advanced Nutrients for a while. I generally give them half of what they recommend. I round it to 4 ml/gal. Also I noticed you are using Micro which I believe is for veg/grow. The Connoisseur Part A is for bloom. Why aren't you using Connoisseur Part B? When your plants are watered pick up the pot to get a feel for the weight. Then test it again when their dry. You'll get a feel for when it needs feeding. Generally I use 5 gallon pots and I split a gallon of water between 2 pots on each feeding. They'll usually need a feeding every 3-4 days. Another observation: You have a few dead leaves hanging on a plant. Get rid of that stuff. It will rot and attract pests.