Yep, fairly typical example of cal/mag deficiency - symptoms of calcium deficiency in pic one and magnesium in pic 2.
Damaged leaves will not recover, but adding more cal/mag asap will stop it getting too much worse.
Remedy won't happen overnight, but it should pick up in a week or so.
Generally, what is now showing in the leaves, is a reflection on what was going on in the soil 2 weeks ago.
Remember to give all your plants cal/mag, preventing problems is better than curing problems!
Hope this helps, Organoman.