Leaves to fast yellow?

Think you have root system issue, some rot or lockout. Most probably caused by bad watering habit. I saw your last diary in soil. So if this one is soil too, make sure you have wet/dry cycle . Aka dont water till pot is easy to lift. Top soil can dry out, but bottom still can be wet if some problems, so only waiting till dry and lifting pots will help you to sort out. This grow is damaged heavily, some mycorrhizae and root stimulants would help girl a bit, but main thing is still good ph and watering cycle.

I’d suggest checking your PPFD. It could be light bleaching since it looks like mainly the top leaves are affected. G