Need help asap?!

Insufficient info.... calcium issues don't come with chlorosis, so probably not Ca in picture 2. the necrotic spots, regardless of what caused them, will not heal. Also, feeding differently and expecting immediate results will lead to more bad decisions. First and third picture do look like calcium deficiency. And middle pic is something else. Too many things cause chlorosis to give a confident guess with the limited information at hand. Your pH is fine, but you might be locking out something due to another nute's concentration being too high. can reference Mulder's chart to guess as to what it could be. Are these different plants or the same? (rhetorical). If this is soilless/hydro, it's as simple as looking at the ppms of each nutrien you provide. Something would likely stand out like a sore thumb. With soil, it's a bunch of unknowns and best guesses. it takes weeks if not months to truly know if how you are feeding is properly done. Expand your time frame of causality. The closer you are to optimal, the longer it takes to see symptoms. This is also a great way to gauge scale of any reaction to symptoms. The plant with spots i'd continue to add more calcium to fertilizer regimen. The other symptoms coudl be lots of stuff... if it is Mg, you will kill 2 birds with one stone, hopefully. If not, you can look for other options on a leaf symptom chart that come with chlorosis where you see it on the plant and how it progressed (location and path of progression help eliminate possibilities.) and try something else in addition to the extra cal-mag. Calcium, as with all other nutes, is not something you simply add once in a while. It either needs to be in the soil or in your fertilizer at all times.