eco23
Aquarium Advice Addict
Clausura said:Yup there is always this layer on the surface of my tank water. I use paper towels laid on the surface to remove it. The filter outlet is on one end of my tank. Since my tank is 4 feet long, the other end does not get disturbed much and will form this stagnant layer. I read that this protein layer will reduce gas exchange between air and water. So to remove this layer or stop it fron forming the forumers' advise to agitate the surface with bubbles. Hope I am making sense here.
I've personally never seen a brown bio-film. IME it's more like a milky white film on the surface. Did the increased agitation remove it?