My attached ATS

[sheung]

I just put a pastic plate in my display under the tank lamp. The water is from the outlet of my top-tank filter.
After two week, some algae appears in the plate. However, there is still no significant drop in NO3.
When can NO3 be reduced?
http://farm4.static.flickr.com/3360/3632201556_b5988ba1e7.jpg?v=0

[SantaMonica]

Need more pics. I'm not sure what I'm seeing. A vid of the flow would help too.

[worley]

This could be to do with a whole host of things, as SanaMonica said, get some more photos, some of the overall tank, more of the screen etc.
If you have a lot of algae in the main display then it could be out-competing the scrubber for the moment, removing nitrate from the water before the scrubber has a chance.
You may need more flow over the screen, or more lighting.
Try and get a photo of the overall tank with the lighting too.
Plus some stats please:
Tank volume
Screen size
Lighting type and power and how much of it goes on to the screen.
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