Sounds like a nutrient lock-out, or possibly toxicity, likely due to a pH imbalance. How are you measuring the pH of your soil and water?
The pictures above, that is very likely what is going on, a pH nutrient lock-out. Check that runoff ph. đ¤đ¤
Also looks like a phosphorus deficiency, but like the other guys said, if you arenât watering with runoff or enough of it or you arenât checking your runoff ppm and pH a flush is probably best