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by John
on 6/27/2011
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These units are well made and make NO noise but make shake here and there but vary minimal.
Mated to the Red Sea Wavemaster they work so well and keeping the tank clean and helping the sea life healthy with random currents.
The magnets are super strong and even their controller works good.
cannot go wrong with these as long as you can get them!
A+++++++++
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