Here is a known problem with Sedra's I have read about and experienced with the Sedra 5000 on my (ex) Euroreef.
The impeller has a magnetic material which is a powder inside the plastic impeller casing. After a couple of years the impeller swells up until it starts to bind inside the motor, then you need to buy a new impeller.
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120 gallon sps/anemones/LPS reef since 2004
Apex controller
8 x 54 watt T5 PowerModule
Herbie's silent overflow system
Jebao DC 12000 return pump
Jecod CP-40 Cross-flow circulation device
Mini Bubble King 180
Barr Aquatics calcium reactor
Bucket fuge
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