You still need a little more biology. That takes time.
Thank you both.This may be just a stage of maturing of your aquarium.
I guess a lot of this is due to my lack of planted aquarium experience, the requirement of faith in nature and patience! I am sure I will learn a lot from you guys and going through the experience. I get so worried about 'irreversible problems' because I did not react!! Patience Brad! Patience! 😀