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I did a search on Rio pumps ( RC search not working now for me)
this is what I found. I copied and pasted it.
Rio Aqua Pumps/Powerheads
From Stan & Debbie Hauter,
Your Guide to Saltwater Aquariums.
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Guide Rating - rating
The Bottom Line
Rio Aqua Pumps/Powerheads deliver high pressure water for most tank functions. They should not be used for constant on/off functions such as wavemakers. These units are known to fail and leak lubricants back into tanks.
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Pros
* Titanium shaft.
* Excellent head pressure.
Cons
* Should not be used for constant on/off functions.
* Require frequent maintenance
* Known to fail and leak lubricants back into tanks
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