Ph/cal mag/ spider mite

It might not be spider mites but even smaller mites like boradmites or russetmites, they are not visible with the naked eye and need a mini microscope to see. Their damage is similar to what your leaves are displaying.

I don't think that's a ca or mg symptom -- these are 2 molecules with unique symptoms, neither of which i see in your leaves. Definitely looks like some pests could be suckling your leaves. Some are very small and you need to use a magnifying glass of some sort to easily see them. Inspect under leaves for eggs. Look for insect "scat". Webbing would be present if it is spider mites, too. If you are 100% certain, could be some genetic mutation or virus on the plant. Could be some veriegation that plant exhibits... variegation is usually harmless, but i wouldn't be ssurprised of some variations of it fuck with photosynthesis potential of the plant. Since it isn't really uniform, i'd still lean toward pests chewing on your leaves. A virus would be quite rare and impossible to be certain of simply by looking at the plant... you'd need a lab to test plant tissue. Over time i've had a plant or two exhibit some odd growth and spots and it had nothing to do with nutrients or pH of substrate. No idea if it was a mutation or virus.. doesn't matter.. the plant grew like shit whatever it was. That is the key.. is it growing well or not? double-down on inspection for pests because that (pests) most definitely will have a negative impact on the plant.

Hello mate, you don't have a diary so it's more difficult help you, anyway you could have more probably an infestation of trips or whitefly than an issue with CaMg. Try to check under the leaves if you see something like a very little worm white that it moves moving the leaves so you have trips. You could try to treat with Neem's oil and potassic soap. Good luck and happy journey.

I think you have answered your own question mate! Calmag