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Old 04-15-2014, 07:55 PM   #1
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Motor Rattle/noise tips

My Fluval Aquaclear 70 motor rattles and makes noise pretty loudly after about 2 years. I can take the prop out and clean it, but it only stays quiet for a day at most. I suspect that fish are kicking up sand, and that's getting in there junking it up. But like I said, I ran the filter for two years now and haven't had a problem. I've though about shortening the down stem, but I like the waters intake low in the tank.

Any advice on how to clean out/quiet the prop? Thanks in advance.
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Old 04-15-2014, 09:47 PM   #2
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Sure it's not the impeller going bad?
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Old 04-15-2014, 09:57 PM   #3
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Check the impella for damage to the blades. If you use a prefilter sponge on the intake, it will stop the sand being sucked up....
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Old 04-16-2014, 12:48 AM   #4
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Check the impella for damage to the blades. If you use a prefilter sponge on the intake, it will stop the sand being sucked up....

I'll try that, I just cleaned it out again, and it was quiet like brand new, I'm sure now it's the sand. Thanks.
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Old 04-16-2014, 05:50 PM   #5
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In my sand tanks, I take one of the intake extensions off so it's higher up. One of the drawbacks of HOB is that the impeller comes before the media.
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Old 04-16-2014, 05:53 PM   #6
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In my sand tanks, I take one of the intake extensions off so it's higher up. One of the drawbacks of HOB is that the impeller comes before the media.

I thought about doing that, but I like it lower to get more of the waste. I'm going to see about the sponge though.
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Old 04-16-2014, 06:37 PM   #7
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I thought about doing that, but I like it lower to get more of the waste. I'm going to see about the sponge though.
Fluval make them or non-branded ones can be got on ebay......
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Old 04-16-2014, 07:08 PM   #8
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I just picked one up.
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Old 04-16-2014, 08:04 PM   #9
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I just picked one up.
Have you tried using Vaseline on the impella and shaft. It may keep it quiet between cleaning although at two years old, it shouldn't need it. It may well be best to just replace it???
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Old 04-17-2014, 01:34 AM   #10
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Motor Rattle/noise tips

Quote:
Originally Posted by Ian086 View Post
Have you tried using Vaseline on the impella and shaft. It may keep it quiet between cleaning although at two years old, it shouldn't need it. It may well be best to just replace it???

It's been quiet all day, I think the problem was my JD was getting spooked when I walked past the tank and kicked up a ton of sand into it, but with the pre filter in place it should be good now.
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