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Old 04-04-2008, 07:43 PM   #1
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Film on surface of water

My tank has been up for about a week. Ammonia and nitrite are at 0, nitrates are 10-20ppm, running submersible filter system, and I've got a strange like film on the surface of the water.

Don't have a powerhead, and will be doing a fuge here in a couple of weeks.

All levels look to be good, and my green chromis is great as are the hermits. any ideas?

oh, 30g w/30# cured LR and 40# live sand.
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Old 04-04-2008, 07:59 PM   #2
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DOCs and possibly oils from your hands/arms. That's one of the reasons for having a powehead pointing towards the surface to ripple the surface. DOCs or any surface film prevent the proper gas exchange of oxygen and carbon dioxide from taking place. This lowers the oxygen the level in the aquarium and lowers the pH (from increased CO2).

A skimmer is used to remove the DOC's.
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Old 04-04-2008, 08:02 PM   #3
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so I should get a powerhead then for now? I'm not sure I want to invest in a skimmer yet.
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Old 04-04-2008, 08:31 PM   #4
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I have a ph pointing at the surface of my tank. Clears up that oily substance
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Old 04-04-2008, 08:35 PM   #5
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Yes for now get a PH and point it at the surface but in the long run a skimmer will be better.
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Old 04-04-2008, 09:02 PM   #6
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The PH pointing to the surface is something you want to do regardless of the surface scum, for proper aeration. The additional thing that you can do that will help is to get one of these...

Aquarium Surface Skimmer

... and hook it up to your submersible filter. That way you'll pull water from both the surface and from under the surface.
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Old 04-04-2008, 09:02 PM   #7
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I'll be setting up a fuge in the next couple of weeks but my buddy has a PH I can borrow, albeit a super powerful one.

unfortunately, my current submersible filter doesn't have an intake as that skimmer utilizes.
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Old 04-04-2008, 10:00 PM   #8
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You can buy a kit that will pull water from the surface or you can make one yourself. I did that for my 5g nano. I had a simple HOB filter that had nothing it it and I used PVC to make a surface skimmer it worked out pretty well.

When you add your fuge are you going to add an overflow or just a HOB fuge?
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Old 04-05-2008, 09:41 AM   #9
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likely just an HOB fuge.
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Old 04-05-2008, 11:56 AM   #10
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Take a look at this. This is what we were talking about you adding to your powerfilter.

Aquarium Surface Skimmer

LOL Kurt I didnt' see that you had already posted the same thing!
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