Problem with Rena XP3

[gvildawg]

My Rena is about 7 months old and recently the volume of water passing through it has decreased by half or more. There are no clogs in any of the lines. I unscrewed the top and there's nothing under the cover except the motor/pump. Unless there is something stuck in the inlet or outlet inside the plastic housing (and I don't think that there is) is my pump/motor going bad? Do I have any options other than to either replace the motor or buy an entirely new filter?
I should mention that I am running the same media in the filter that I always have run except I added two compartments of ceramic media several weeks ago. I usually clean it every 3-4 weeks and it has only been a couple of weeks since the last thorough cleaning.

 

[Squawkbert]

You probably just need to back wash it. Remove the lid, pour treated water into the top, letting it flow out the usual inlet channel. If passing a gallon or two this way does not do it, treat another half bucket of water and dump your media in it, rinse, repack filter. You just (probably) have some mulm building up. If you have foam/sponge/floss materials, rinst them too.