dust problem

[Grendal42]

i just set up a little nano and every day tere is a film of green dust like stuff on my glass how can i make that stop?????

 

[DMBillies]

I'm assuming it's on the inside? If so, it's probably just that your brand new tank is going through an algae bloom. It is very common with new tanks and you may even go through multiple ones (with different algaes) as the tank matures. You more or less just have to wait it out.