Clean those filter and pump impeller shafts

Sicce Syncra 3.5 pump with impeller removed. Photo by the author.

Just like everything else about your power filter or pump, those impeller shafts and channels can get dirty, which might affect the performance. Specifically, dirty impeller components, channels, and wells can cause the impeller to not rotate on a restart. Ever had a canister or HOB filter not start back up after a power failure? The usual cause is gunk around the impeller and housing. 

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