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Old 01-19-2004, 02:20 PM   #1
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Microbubbles... still

I've posted once before about stuff in my tank. I've added an aqua sock and removed the particles, but the microbubbles remain.

The aqua sock is around the outputs of my UV sterilizer and my protein skimmer, so I think that I can pretty much discount those as possible sources. I hear frequently that the return pump is the cause of microbubbles. My return pump is a CAP 1800, so it's not brand x, but it's not anything high dollar. Is there something I should be doing to be sure that it's not causing microbubbles? It's entirely submerged.[/url]
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Old 01-19-2004, 02:43 PM   #2
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many times the problem can be small pin-hole leaks in the plumbing that is sucking air into plumbing as it goes I would start there.
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Old 01-19-2004, 02:44 PM   #3
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wouldnt that mean that some water could be getting out as well and you would find a small amount of water or salt creep on the plumbing? i ask becasue i am having the same problem.
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Old 01-19-2004, 02:45 PM   #4
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not necessarily. It's the same principle as the venturie valve on the PowerHeads or on skimmers. As the water passes by the hole at a high velocity it draws the air in the hole along with it.
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Old 01-19-2004, 04:13 PM   #5
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When the pump was turned off it might leak a small amount, if there was enough pressure behind it.
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Old 01-19-2004, 04:23 PM   #6
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I think that I need to make it clear that I don't have a TON of microbubbles in my tank. There are just a few floating around in my tank all the time. There's always particles floating in the water to some degree, but like 80% of mine now are microbubbles.

I guess what I'm trying to say is that whatever the cause of this is, it must be incredibly small.

I don't know how I'm going to be able to isolate a hole in the plumbing between the return pump and the tank. Any suggestions? And if that isn't the problem, what's next?
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Old 01-19-2004, 04:26 PM   #7
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It is more than likely coming from the turbulance in the sump, a sponge (cleaned often) and a baffle should get rid of them.
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Old 01-19-2004, 04:35 PM   #8
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I took a look at the sump up close and the water in it is very calm. The returns from the protein skimmer and the UV sterilizer are going through an aqua sock at this point and it reaches all the way back down to the water level. Thus, there is no dripping at all.

I can't put baffles in my sump because of its lack of size and the fact that it has SO much equipment in it (return pump, UV sterilizer, Mini-Jet 600, protein skimmer, pump for protein skimmer). I would put a spong in it, but I wouldn't know where to put it. Perhaps I could cut a few pieces of sponge to put around the intakes of the return pump, but that's all that comes to mind. If it didn't work at least it would narrow down the cause a bit more. Whatcha think?
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Old 01-19-2004, 04:45 PM   #9
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Look through the side of the sump, shining a flashlight down through the top, this will let you know if they are in the sump and then returned to the tank, or if it is somewhere from the return pump to the tank.
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Old 01-19-2004, 04:53 PM   #10
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Well, I didn't use the most powerful of flashlights, but I looked for a couple of minutes and I didn't see a single particle of any kind in the water.
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