11-22-2019, 10:53 AM
Join Date: Jul 2010
Location: Dallas, Texas
| | Re: Film on water surface
Originally Posted by Cavan Allen
IMO, removing the surface scum is a virtually a REQUIREMENT. As mentioned already, it inhibits gas exchange. That's a problem for your filter bacteria and everything else. If you're adding co2, it can trap excess. I now use the Eheim Skim 350 and though I have to clean it weekly, I like it a lot.
The Eheim is my favorite method too, and it will also clear a tank of duckweed!