This works good just like my previous model but did not fit as a replacement  part.  Looks  sort of the same in the picture but is a different size and configuration and difficult to  tell from description and model #.  Ordered one to see if just the clear housing would fit the existing top.  No match. Since  I use several in a series  it was obvious that the whole setup would need change. After some  plumbing and piping adjustments, it is working just fine.  I'm happy with the system. It filters out much of the SoCal water "stuff" that the aquarium fish and humans don't like.