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My experience last night was that after noticing reduced water flow
with my fluval msf 404 I unplugged it and plugged it back in and
noticed no water flow at all. Then I took the impeller well cover off
and discovered the ceramic shaft sticking to the cover instead of
staying in the impeller well. So I corrected it by removing the
ceramic shaft from the cover and inserted it back into the tiny hole
in the bottom of the impeller well - and now it seems to be working
perfectly. I just thought I would share my experience with these
things too. Thank goodness they are as reliable as they are (canister
filters). Good luck and later!



When installed, I think the 404 shaft is in both the well cover and a
black rubber washer at the other end. Which end it sticks to during
disassembly is not material to its operation. Your re-installing it
probably dislodged any mulm which was preventing the re-start. jmo.
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