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#1
03-14-2011, 11:20 PM
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Koralia Evolutions... Click/thud noise
Just got my reefkeeper lite controller set up with brand new Koralia 1050's. I have them oscillating every 20 seconds. I am hearing a click/thud noise that last less than a second everytime each powerhead turns on. It is annoying and my fish are pretty scared of the noise. Just wondering if anyone else was able to fix this? Do I just have lemons? These are supposedly able to work on wavemakers/timers silently.
-Thanks Last edited by apex82; 03-14-2011 at 11:49 PM. 
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#2
03-14-2011, 11:46 PM
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I had to stop using koralias after I got a wave-maker for the very reason you're describing.
I'm not sure if the model you have has the same problem, but the Koralia 1, 2, 3, etc. series have magnets that aren't snugly secured in their housing, so that when they start up, the impeller assembly gets pulled up the pin and away from the housing until it creates enough back-pressure from the spinning impeller to push the magnet/impeller assembly back down and centred in place. As the impeller assembly gets sucked upwards in that first second, it rattles all over the place. Sometimes the noise isn't very loud, and sometimes it sounds like the impeller is going to break, but with the models I had, it made a noise every single time they turned on (which, as you can imagine, was infuriating with a wave-maker). Someone on RC figured out that if you thread a small piece of airline tubing onto the pin the impeller spins around, and put it between the top of the impeller and plastic housing of the pump, it stops that rattling from happening. Unfortunately, it also seems to cause the impeller to spin backwards about half the time. Anyway, I'm not sure if that's the same problem with that model of pump. Because of that issue with my Koralia 2s, I now have a whole tupperware container of koralia pumps collecting dust in a closet...
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#3
03-14-2011, 11:56 PM
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Ya thanks for the reply. I know of that problem and replaced my Koralia 3's with the new EVO's that supposedly do not start in the wrong direction for the reason you described. This new model is supposed to run on wavemaker/timers without the loud chattering... The noise with these is not nearly as bad as turning on/off the old Koralia 3, however, definately not acceptable for oscillating use.
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#5
03-15-2011, 05:09 PM
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Quote:
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#6
03-15-2011, 10:04 PM
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I have tghe same setup except I went with the 1400's and they do the same thing, has never gone away. But was a bit dissappointing considering they were suppose to be silent on/off....
TJ
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75G, 100 lbs LR, Inwatter Stingray LED's, 25 Gallon Sump, 24wt UV, hermits, Snails, pep, fire & cleaner shrimps, Blue Throat Trigger, Perc Clowns , Yellow Tang, Coral Beauty, Blue Regal tang, RBTA, Coral Banded Shrimp, Checkerboard Wrasse, Many Corals, Royal Tux Urchin
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