I wonder if it is not a problem with the 2500 model. I have three
smaller Rio pumps on my skimmer, refugium and my water top off system
and they never have problems.

The Rio 2500s that I have had seem to be failing in the same way. The
impeller seems to get worn on the side towards the motor, and the only
thing I can see that could cause it is a small raised area where the
plastic was injected into the mold.

It looks as if the impeller gets too much play and jams in the housing.

Two pumps in three months is too many, I am going to try a Mag 7 next.



Todd W wrote:
I have heard nothing but bad things about Rio. However, my reef is now
3 1/2 years old and my Rio return pump has worked 24/7 all this time
without a lick of trouble. Even has the original impeller.
I may have been lucky but my experience has been fine.

Todd