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Old 10-30-2013, 08:06 PM   #1
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Slimey water on top of reef tank

I have a 6ft high 150 gal cylinder artificial reef tank that filters to a live rock sump in my basement. I also have a reef octopus skimmer in the sump. The tank has good circulation but the water on the very top is very slimey/bubbly, in fact its almost like oily spots in the water. What can I do for this? Do I need a powerhead on the top of the tank or is there something I can add to the tank (chemical or fish/inverts) to help.

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Old 10-30-2013, 08:17 PM   #2
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Is it from the food?? I read to point your powerheads up. So far so good for us.
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Old 10-30-2013, 08:30 PM   #3
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Is it from the food?? I read to point your powerheads up. So far so good for us.
No, I don't think it from the food as the slimey film seems to be in there all the time.
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Old 10-30-2013, 08:36 PM   #4
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I'm only a newbie, but I have the same problem. My LFS told me this is protein and that I probably don't have enough surface agitation. I'm waiting for my powerhead to turn up and hopefully solve the problem.
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Old 10-30-2013, 10:36 PM   #5
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Does your drain skim the waters surface?
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Old 10-30-2013, 10:39 PM   #6
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Surface aggitation will get rid of it.
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Old 10-31-2013, 08:16 AM   #7
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Surface aggitation will get rid of it.
Thanks. What should I do to increase the surface aggitation? I can see the top of the water has a slow/steady current.

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Old 10-31-2013, 08:18 AM   #8
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Does your drain skim the waters surface?
I have a durso pipe in the overflow, so the elbow where the water goes is a few inches under the water
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Old 10-31-2013, 10:38 AM   #9
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I have a durso pipe in the overflow, so the elbow where the water goes is a few inches under the water
Is your drain inside an overflow box though? I would try a powerhead pointed toward the surface aimed toward your overflow to force the surface water into it. Sometimes if your return comes from the same place as your overflow it can keep the surface water away from it. Hopefully you can understand my rambling.
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Old 10-31-2013, 12:27 PM   #10
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ok, can you recommend a good powerhead for that? The tank is a 27.5 diameter acrylic cylinder, 150 gal. Everything would have to be mounted inside

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