Join Date: Apr 2013
Location: Fort Collins, CO
Are you using CO2 at all? I know some liquid CO2 stuff causes a film on the surface.
Also, what filter are you using? If it is strong enough it should be able to agitate the surface and break it up.
I don't have much experience with this, but I'm sure other members do. Hopefully you find a solution soon!
love my aquarium(s).
40G Breeder Tank