How to?

There's been to much nitrogen available, tell tale signs is the darker green and wilting leaves.. Not quite sure of the problem about the pH water so il take a guess and give a few examples to lower ph you can use.. Coffee grounds.. Diluted vinegar, pine needles.. Add compost (normally neutral) ... And to raise the ph... Wood ash.. Baking soda.. Trying to think of things around the house to help your problems. Hope this helps.. Add 1 of the previous suggested to get the pH correct and give a flush is the best and quickest way to solve this.. Good luck

Yeah, that sounds like salt buildup locking things up. You can ease it without a full flush just run a few light waterings at low EC (around 0.4–0.5) with proper runoff, let her breathe, then reintroduce nutes slowly. Add a bit of Cal-Mag if your base water is soft. She’ll tell you when balance is back