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Old 10-20-2011, 01:21 PM   #1 
Gen2387's Avatar
Join Date: Oct 2011
Location: Montréal, Canada
What's that floating at the surface?

Today was my first water change in my new 5gal. It went very well, Admiral seemed fine, took it like a pro. Anyway, before the water change, I noticed some kind of transparent film floating on top of the water and I thought it would go away after the water change (I did a 50%) but there are still some small pieces floating around. Here's a picture. I've had aquariums before but it's my first time for a Betta. Is it typical? My Betta is doing great so I don't think it's affecting him. I work with dogs and cats so fishes are not my area of expertise. LOL!
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Old 10-20-2011, 11:43 PM   #2 
Rain Drop
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Join Date: Jul 2009
Location: Victoria, BC
Probably just oils off of your own hand or equipment. It's harmless.
I get that ugly film on my tanks too after a few days.
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Old 10-21-2011, 01:09 AM   #3 
Join Date: Feb 2011
In new tanks its common for oils from your hands or the hands of the guy who built the tank to come to the surface. As time goes on the oil and fat scum will be replaced by oxidizing protein scum, then by nitrifying bacteria scum and then by bubble nests.

Filtration gets rid of it fairly well so does a little salt most the time.

Remember with Betta that they inhale some of the surface tension when they get a breath. Sometimes you'll see them wiggle their nose around to break the thin scum before cycling their labyrinth gland. If scum gets to be a problem you can generally lift it out using a scrubby block, just stick it under the scum and lift it up so the water drains through it.
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Old 10-21-2011, 11:47 AM   #4 
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Join Date: Aug 2011
I get it in all of my tanks. It doesn't hurt anything, just looks bad.

Only tank that I don't get it in is my big cichlid tank, it has a surface skimmer on the filter. I wish someone would make a small filter that had the skimmer,
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