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Old 01-28-2005, 04:21 PM   #1
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Surface film

On the surface of my tank is a layer of some sort of film, which bubbles are sticking to. If you put a finger into the tank the film spreads away from your. What is causing this film? Should I do a water change?

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Old 01-28-2005, 04:23 PM   #2
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Possible chemical contamination from your room maybe? Definitely need more water circulation at the surface. Maybe point one of your powerheads at the surface.
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Old 01-28-2005, 04:59 PM   #3
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ok thanks, I guess its time to put a powerhead in there. But wont there be too much current? Its only a 20 gallon tall and already has a prism skimmer and an emperor 280 on it.
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Old 01-28-2005, 06:05 PM   #4
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A good rule of thumb is that there really shouldn't be any water not moving on the surface. I had a 20 tall running with a Skilter and a powerhead and ended up adding another powerhead just cutting the surface. It got rid of that stagnent film like your talking about. Or could you reposition the Emperor to get more agitation on the top...just a thought.
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Old 01-28-2005, 08:12 PM   #5
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The film is likly a collection of DOC's in the water. Are you running a skimmer? If so do you have a surface skimmer to take water from the top of the tank? Ways to lower this film would be as follows:

Water change
Reduce feeding levels
Reduce stocking levels
Increase water circulation at the surface
Install a surface skimmer to skim off the film before it can collect
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