Help

Not alot of info. Plants are looking decent. Time to Schwazze (If this was my plant I would cut off all of the big fan leaves and keep doing what you are doing) When they are young you start out with water, as they mature 1/2 nutrients, at this stage they hungry like a teenager, they are using more food so you go to full nutrients. You can grow in any size pot even a 20oz coke bottle, smaller pots equal smaller plants that is all. Smaller pots need to be watered a little more often than bigger pots when the plant is mature and hungry.

I agree that your pots are too small. I feel a lot of people see lower leaves dying off, and immediately think it's a nutrient problem, but plants also consume lower leaves when they're thirsty (in your case, from pots being too small Id wager). What size are those?

I wouldn't be too concerned currently. It's only affecting a few of the huge jurassic leaves at the bottom, worry if that starts happening in newer growth. I would have defoliated most of those out a long time ago personally.

Growing in pots that are waaaaaay too small causing problems in the root zone.