On Sunday 30/12/2012 scratched the screen and checked the amount of algae. Scraping algae were rinsed to obtain as pure water, and then drained to the wet state (as it did previously, a description of # 6). I got 0.887 g / 1 square inch.
I think this is a good result.
I wonder what sets attain their screens for 1 square inch.
Below is a screen with a model that continues to keep the sump but without forced flow. Only lighting. Interestingly, after two weeks of growth of algae have from 2 to 3 cm, and no dead zones with dead algae.