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Old 06-06-2012, 09:19 PM   #1 (permalink)
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Default Quieting a noisy filter

I have a question for Aqua Clear 50 filter owners: Is a groove on the inside of the impeller housing, about halfway down, normal?

As I mentioned in another thread, my AC 50 has been a tiny bit noisy. It started a few hours after it was plugged in with a little mechanical rattle, then after fiddling it quieted for a day.
But last night, disaster struck. The power went out in my entire town (seriously) for a good 3 or 4 hours and my husband and I decided to head out to see a movie. 15 minutes into said movie, I realized I had forgotten to unplug my filters so they wouldn't run dry if the power came back on.
The power did come back on maybe a half an hour before we came back, but my AC 50 was running fine... except a slightly louder mechanical noise. It's a continuous fast clicking that I can hear loud and clear when I'm next to it and at night when it's quiet. I'm afraid that perhaps it was running dry while trying to prime.
So this morning I googled the problem and tried a couple things.
I read about possible deposits that could imbalance the impeller, so I
1. soaked the impeller assembly in white vinegar. (Probably not the issue, but it wasn't going to hurt to try.)
2. I swabbed the inside of the impeller housing with a q-tip. The q-tip turned charcoal gray. I also discovered the groove in the impeller housing.
3. I coated the impeller housing in Aqua Safe slime-coat enhancing liquid, as I read that filters can quiet over time by developing a slime coat.

Anything else I can try? And again, is that groove in the housing normal?
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Old 06-07-2012, 02:44 AM   #2 (permalink)
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Default Re: Quieting a noisy filter

Impeller housings have a protective lining over the magnetic part and when the lining is dissolved or damaged, it can result in a loud noise. it can happen when the power goes out suddenly or when soaked in vinegar. My power head got real noisy when the power went out. When soaking, you should use special formulated bathing soap from you fish store. It will protect your gear.
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Old 06-07-2012, 04:37 AM   #3 (permalink)
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Default Re: Quieting a noisy filter

Grove is normal from what I remember. I take mine apart about once a year on my AC50. I've never had an issue with mine fortunately.
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