Def

That's almost definitely a Cal-Mag deficiency. Increase pH to betweeb 6.3 and 6.5, as this is the ideal range for Cal-Mag bioavailability. Wait a week or two and watch for improvement. Your leaves won't return to their prior coloration but New growth should appear normally colored.

Over watered, over fed,,,,, not a deficiency but a toxic build up of nutrient salts leading to this burning symptom.

I'm applying 1.3 g of plant prod, 0.7 g of calcium nitrate, and 0.5 g of magnesium sulfate. + 1 ml of 10 volume hydrogen peroxide per liter.

Look like pH fluctuations fix your pH to around 6.5

Definitely No defiency More the opposite. Unbalanced grow To much nutes to dry and maybe Close light. But as Iam having No diary ITS Just a Güssing. But No Güssing IS that ITS No defiency

Ph 6.0 for soil too low. 6.5 , no feed, just plain dechlorinated ( evaporated ) water when needed for 2 weeks. Those leaves wont recover, but new grow should be better.

Inert means there is no real nutritional value so you need to supply all nutrition. Looks like a mixture of calcium and magnesium deficiency. That, or your soil ph is out of range.