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Surface Film
I have a 125gal planted tank established for over 6 years. I have a surface
film that looks like a thin layer of wax paper floating. When I do a water
change and do pruning It disappears. Then the film starts back within 10
hours and builds. It does not seem to affect the fish. If I try to scoop it
up with a fine mesh net, some is collected and the rest breaks up in the
turbulence, looking like skin peelings. It has no odor and washes out of the
net easily. I use a CO2, yeast system, but have turned it off for over a week
now.
Any suggestions?