As I can't see clearly the first 2 issue, I can't comment. The 3rd one is hair algae growing on your hair grass. Best to eliminate by using hydrogen peroxide solution you can purchase in 100ml bottle at local pharmacies like Watsons. And followed by Seachem Excel dose.
Google for this remedy to eliminate most algae types but easier to treat in a quarantine tank as your Hair grass is in a SS mesh. This 1-2 knock out treatment will damage your mosses and if overdose will also kill your fishes. So go google the dosage.
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