REally, they look like there is nothing significantly wrong. If your MG soil were causing problems, you would see tip burn.
Filtered water is not necessary, don't worry abotu that. If it is SOFTENED, that is another issue. But normally, water out of the tap is fine. If your well water is alredy quite soft, you might need to addcalmag plus to it. But you will see evidence of Ca deficiency if that is the case.