Join Date: Oct 2002
Location: Wilmington, DE, USA/Philly, PA
This algae/bacteria forms on plants, gravel, and glass. It appears as a black/very dark green film that is fuzzy and VERY difficult to remove from silk plants (had to scrape with my fingernail).
I am planning on switching this filter to my new 29 gallon...want to know what I am dealing with before I switch it to my 29 gallon.
This is a lower light 1.5wpg (10 gallon with 15w bulb) tank...20ppm nitrate, 0 nitrite, 0 ammonia...pH 7.5 Fresh water, live plants (sparsely planted) with medium natural gravel.