It looked like a magnesium issue, as calcium starts at the top with new growth. With that being said, be careful, as all the amendments you put in, will start locking other elements out. The newest pic is showing what can be the start of either a sulfur or iron deficiency. Bat guano being as high as it is in P, and plants don't actually use too much phosphorus, can lock iron out. An organic way to add it would have been to use epsom salt, you get the mag and sulfur in one. Plants look nice otherwise, best of luck!
