What kind of disease is this?

･It starts to die from the tips of the older leaves.
･Very yellow leaf veins.

I've adjusted the temperature and humidity according to the manual, but I've given the plants too much calmag in the past.
It is also possible that the ph was below about 5.4.

Three days ago I improved the fertilizer to the image below, but so far the yellow leaves below have progressed. Have I neglected this disease too much?

Hi cannabutterman, did you ever solve this? I'm facing an issue that appears similar (yellowing veins, and leaves curling upward and dying at the tips) but mine is at a much earlier stage of growth.

In my case I think the issue might be that my tap water has a very high EC (500 or so), and on top of that I may have overfed my plants early on.