cheato not growing

[vio]

Quick question?
Why did you put the Chato in in the first place?
Do you want to reduce nutrients?
Or do you like growing green stuff?

+1
In one post you have Nitrate 0, one one more Nitrate 10, Chaetto is great to reduce Nitrate but very hard to balance, hard to say how much you have to remove or stay.
Chaetto need space , flow and good light ( i use to have 2.700K)