White film on the top of the tank

PheonixKingZ said:

Will you please upload a picture of the film?

Are you sure it was white? Are not a silver/rainbow color?

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raylove said:

This can be caused by water quality issues or sometimes just because something changes e.g. I've seen it occasionally after a major clean up or plant thinning and in such circumstances it soon settles down and will disappear.
Also, I have a Juwel Bioflow internal filter. When I turn it off to do a water change, water inside the filter runs out of the intake and can leave a film on the water surface. Once I turn the filter back on it soon clears up, though if it looks too bad I do sometimes skim it off with a plastic cup first.
Another thing to be mindful of us if it is something that came from you! A couple of times I have put my arm in the water and caused a film because I had forgotten that I had applied sunscreen! In those circumstances I always skim it off - no harm has ever become of this but obviously it's something to avoid!
Whatever the cause of yours is I would recommend skimming it off but unless it persists I wouldn't worry at this stage as it will probably resolve itself.

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