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Oily Film

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Offline fishcake76

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Oily film
« on: January 17, 2015, 07:49:28 PM »
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Hi Folks,

I seem to have oily film on the top of the water on my big tank, i usually soak it up with kitchen towel, as I'm aware it can reduce the oxygen for the fish but I wondered if anyone knew what caused it or how to prevent it?

FC76
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Offline Cod_only_knows

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Re: Oily film
« Reply #1 on: January 17, 2015, 10:25:48 PM »
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Hi FC,

What water conditioner do you use? Stress Coat can leave a film on the tank, though I'm not sure it's that noticeable...

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Offline fishcake76

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Re: Oily film
« Reply #2 on: January 18, 2015, 08:59:50 AM »
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I use Tap safe.

I wondered if it was anything to do with having live plants in the tank?

FC76
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Offline Sanjo

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Re: Oily film
« Reply #3 on: January 18, 2015, 09:59:03 AM »
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I haven't noticed it in the main tank but there was a definite film over the sponge filter in the week.
Since I've fiddled around with the filters this week (checking them) it seems to have disappeared so I am assuming it went through the last sponge filter.

I use Tapsafe
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Offline Richard W

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Re: Oily film
« Reply #4 on: January 18, 2015, 10:00:56 AM »
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I can't see how plants would cause this.
It could just be oil from the fish food, which is intrinsically oily.
Does your filter cause a reasonable amount of disturbance to the surface, e.g. ripples? IF you can make sure it does, this will often disperse the film.
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Offline Sue

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Re: Oily film
« Reply #5 on: January 18, 2015, 02:42:12 PM »
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Richard has it spot on. The usual culprit is fish food.
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Offline fishcake76

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Re: Oily film
« Reply #6 on: January 18, 2015, 05:44:20 PM »
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Right o! I'll try a different food then. I have two filters and both agitate the surface but the film still forms. The reason I mentioned plants was because I noticed it another thread somewhere.

Thanks folks!

FC76
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