Just flushed to re adjust my ph to 5.9 need advice...

Cal mag mate and led light

First I'm no expert myself but I would check light distance, then if that's right try some cal mag. To me looks like it could be calcium or magnesium if it is not the light being to close

Google enzymes. I’m a huge fan of SLF-100. It will wash out the salts and allow the plant to stabilize. You use it with all brands of fertilizer. Cleans the roots. Use after you ph! Has lots of microbes

Looks like nutrients build up in the soil- when you water are you using enough that water runs out of the pot? This helps carry always the excess 🌱

Check your runoff waters ph and ec levels. This is the only way to properly diagnose your plants. This will show you if your ec is creeping up making your ph fall. If that's the case then you would have some lockout, not deficiency. If your ph is out of whack then that would also be lockout, not deficiency. As they look now it's looking like they need cal/mg, but to be sure, you need to diagnose them. Cheers