Film build up??

[Corona007]

Is there any difference between green and brown film?

I used to get brown build up on glass and would need cleaning around 3-4 days.
But now that film is green the last week or so. Kinda puzzled since all my perameters are the same and don't dose anything.

PO4 .O3-.04, NO3 <5

Thx.

 

[stingeragent]

I would assume there is a difference. I'll also assume scraping the green stuff off is much harder than the brown film?

 

[cloak]

Check this out. (Diatoms & Green Film Algae)

http://www.reefcleaners.org/nuisance-algae-id-guide

 

[Corona007]

I didn't notice if it was any harder to wipe off with my mag float, wiped right off as usual.
Now that I think of it I stopped running gfo a few weeks ago. But it still puzzles me that it's green (almost fluorescent) now instead of brown.

Anyway thanks for the link, very useful.