Magnesium deficiency is also a common issue you’ll see, and it’s a bit of a pain to diagnose in my experience. This is because a magnesium deficiency can give your plant’s yellow or brown tips making it look nute burn. Do the opposite when confirming damaged tips from magnesium and look for an overall bright green color, which may be only on the overall color of the damaged leaf itself or the entire plant.
The most common way that magnesium deficiency presents itself is yellowing or browning in between the veins on the leaf margins. Magnesium is mobile so it can present anywhere on your plant.