Is this bad?
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Old 02-18-2013, 09:52 PM   #1
Adamson
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Is this bad?




I removed the HOB filter last week and it seems like this there isn't a lot of top water movement, a layer of this slime has formed on the water line.

Is this bad for the plants or fish, or is it nbd?

Thanks!
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Old 02-18-2013, 10:00 PM   #2
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Default Re: Is this bad?

I would think that the film on the surface would prevent the exchange of co2 and o2. Place a paper towel to try to absorb all that film.
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Old 02-18-2013, 10:03 PM   #3
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I don't know how bad it is, but it's certainly not good.

If it's heavy enough to trap bubbles, I doubt there is much gas exchange going on.

For now, you may be able to manually skim it by dipping a container in and letting just the surface water flow in. It will be a bit tedious, but you should be able to remove most of it that way.

To prevent it, you will probably need some sort of surface skimming attachment for your filter intake, or pretty heavy surface agitation (so that it gets mixed into the water column and picked up by the filter).
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Old 02-18-2013, 10:44 PM   #4
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Default Is this bad?

That's a lot. Remove it by skimming off the top layer of water with a cup, or container. Just submerge until water runs in slowly. When done top off with fresh water.

What type of filtration and water return are you using now? You need to increase surface agitation. I do that by simply turning my spraybar upwards so the outflow disturbs the surface. You can also add a powerhead or circulation pump. Whatever method you choose, the sum will diminish.
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Old 02-18-2013, 10:55 PM   #5
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Definitely skim off the protein layer until you can do something to increase water movement.
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Old 02-19-2013, 12:49 AM   #6
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Default bad because of..

first this film will reduce/block the light that goes into your plants.
second it is not strictly do harm to your tanks, but it is aggregation of bacteria, and not a welcome guest.

removal, use the plastic wrap(saran wrap) toss it on the top, and it will stick to it, then trash. use a piece of paper towel, or newspaper.

best way is to create a wave on the surface of the water, then it will not form again.
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