Oily Slick on Surface of new tank

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pulpracer

Registered Member
Dec 8, 2007
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I have a 12g Nano Cube that I'm using for freshwater. The tank has been up and running for about two weeks. It has a few fish, one of which came from another tank I was replacing. In addition I have substrate from the previous tank.

BUT - I have an oily slick building up in the tank on the surface. It's primarily concentrated in the filter pump chamber in the back (there are three chambers in the back one has filter sponges, the next has ceramic rings, bio balls and a carbon bag, the third is empty except for the pump). But there is also a good bit of it on the surface of the water in the tank itself. Does anyone know where it's from and how I can get rid of it? It doesn't seem to have any kind of negative impact on the fish.

RJ Thomas
 
But that seems so simple. Surely there's a much more complicated and costly solution.

;-)

Thanks!
 
pulpracer said:
But that seems so simple. Surely there's a much more complicated and costly solution.

;-)

Thanks!
Click to expand...

You want cheap!! Use a piece of newspaper instead of the paper towel. Works just as well and doesn't cost a cent. :)
Disturbing the surface of the water will help prevent the film from forming. If you can, as an example, direct the output of your filter across the water's surface.
Beasts
 
make sure that your filter is causing enough aggitation on the water surface, the oily slick can be a sign that stagnant water (like beasts said). move your output head upwards or lower the water line slightly to cause more disturbance. if it is this, it can trap harmful stuff in the tank and also deplete the water of oxygen. still easy to fix though!
 
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