kbrookes Posted May 1, 2014 Report Share Posted May 1, 2014 I'm got a 54L Juwell Korall donated by relatives which has been running just fine until the filter died late last week. PetBarn was just about the only option for picking up a replacement quickly, so I wound up getting the Tank Maid Pro 400. Glad I didn't go for the 700L as even this one has massively more flow than the OEM model. However just a couple of days in and it's become incredibly noisy with a loud humming/buzzing noise emanating from the tank, which wasn't there in the first few hours of operation. It's so loud you can clearly hear it at the furthest end of our 3 bedroom home - it's as far away a it could be. Is this normal for this brand? Is there a relatively price-conscious brand that is quiet? Thanks for your help! Link to comment Share on other sites More sharing options...
Yodapwnsasmurf Posted May 1, 2014 Report Share Posted May 1, 2014 I've got the same problem with my canister, I think it's when it gets an air bubble stuck in it... Someone else might be able to help out though... Link to comment Share on other sites More sharing options...
Donny@ageofaquariums Posted May 1, 2014 Report Share Posted May 1, 2014 Yea thats way too loud. Have you pulled it apart and inspected the impellor? Link to comment Share on other sites More sharing options...
Donny@ageofaquariums Posted May 1, 2014 Report Share Posted May 1, 2014 I've got the same problem with my canister, I think it's when it gets an air bubble stuck in it...Someone else might be able to help out though... Think this ones an internal powerhead hey. Link to comment Share on other sites More sharing options...
Yodapwnsasmurf Posted May 1, 2014 Report Share Posted May 1, 2014 Think this ones an internal powerhead hey. Oh right, forget everything I said then! Link to comment Share on other sites More sharing options...
Donny@ageofaquariums Posted May 1, 2014 Report Share Posted May 1, 2014 Oh right, forget everything I said then! nah, can still be air pocket man, especially if its not totally submerged. Link to comment Share on other sites More sharing options...
Sparky19862 Posted May 1, 2014 Report Share Posted May 1, 2014 Cavitation is a noisy b**ch!!! Link to comment Share on other sites More sharing options...
Yodapwnsasmurf Posted May 1, 2014 Report Share Posted May 1, 2014 nah, can still be air pocket man, especially if its not totally submerged. You can blame Bear for this one.... Link to comment Share on other sites More sharing options...
Tristan Posted May 1, 2014 Report Share Posted May 1, 2014 You can blame Bear for this one.... heh, heh, i get it Link to comment Share on other sites More sharing options...
kbrookes Posted May 1, 2014 Author Report Share Posted May 1, 2014 Thanks for the replies all! Yes - internal filter. I had already inspected the impeller and there were no visible issues. It's fully submerged (at least two inches under the water) and I've played with various heights to see if that makes a difference. I've turned the venturi on and off and it doesn't change (except adding a loud bubble sound if I fully open it) and I've checked the media containers for any debris. It's also not touching the tank except for its suckers. Link to comment Share on other sites More sharing options...
Sparky19862 Posted May 1, 2014 Report Share Posted May 1, 2014 Have you looked to see if the rubber bearings are still present?! If the shaft isn't located properly in the bearings (actually they're more a bush than anything) ten as the impeller turns it'll spin off center to where the strongest pole is in the motor. Had this once on my otto 800 internal, cleaned it, put it back together and found it making tonnes of noise. Later found the rubber sitting in the sink! Alternatively it could be the motor. Does it sounds more mechanical or electrical?? If you know the difference.... Link to comment Share on other sites More sharing options...
kbrookes Posted May 1, 2014 Author Report Share Posted May 1, 2014 I think it sounds mechanical, it has a stronger vibration feel to it. Then again, both it and my coffee grinder sound like 50hz, so it can sometimes be confusing! Link to comment Share on other sites More sharing options...
kbrookes Posted May 2, 2014 Author Report Share Posted May 2, 2014 Nothing wrong with the impeller that I can see, so I'm thinking I might have to take it back. Are there any internal filters known to be quiet that aren't ridiculously expensive. Link to comment Share on other sites More sharing options...
Donny@ageofaquariums Posted May 2, 2014 Report Share Posted May 2, 2014 Yea definitely take it back, thats terribad. Even a cheap serenity 450lph is decent quiet and they are $15 Link to comment Share on other sites More sharing options...
Sparky19862 Posted May 2, 2014 Report Share Posted May 2, 2014 Yeah my otto 800l/he is whisper quiet, till My co2 gets pumped through it! I'd defs take it back mate. No little internal like that should sound like a coffee grinder!! Any visible damage on the impeller?? Another train of thought is that the shaft may have come loose through the magnetic rotor causing what would normally be tight tolerances (read 10thou of inch or less ) between the impeller and the housing or the impeller has come loose on the shaft and done the same. Believe it or not I see it all the time at work, when a pump comes in that should push 10000 l/m and it's only doing 2000 it's because the clearances between impeller as housing has been worn. Mind you last time I saw it everything was smashed beyond belief!! Just take it back provided you've still got your receipt! Link to comment Share on other sites More sharing options...
The Tech Den Posted May 2, 2014 Report Share Posted May 2, 2014 If you just want to try with the little internal to submerge it and turn it upside down and then right way up a few times and see if there is an air pocket that gets released with the movement. Try it switched off and also switched on and see if that fixes the issue. Link to comment Share on other sites More sharing options...
