Originally Posted by iamntbatman
I've heard that people with planted tanks have had success using surface skimmers to deal with protein buildup. It removes the film without disturbing the surface enough to really affect dissolved CO2 levels.
Something like this: http://www.fosterandsmithaquatics.co...m?pcatid=12703
Yes, those work very well, I had one on each of my three tanks with the Eheim canisters for years. I've removed them now, though, because the small fish kept getting sucked in to the filter. And in the 70g, where the protein scum occurs, I have spawning Chocolate Gourami and Pygmy Sparkling Gourami and the fry hide out in the floating mass of plants and would easily get pulled in. You can fix screen over the openings, I just didn't want to bother.