What is the difference between the Pool Buster Catfish and the regular Pool Buster? The only thing I can find on WaterTech's web site about the Catfish is that it was rated as one of the Top Products of 2006 by Pool & Spa News magazine...and I found that by doing a "google" search on pool buster catfish. I saw the Catfish on E-bay and noticed it's less than $100 new, so I was wondering what the difference is. I'm wondering if maybe the Catfish was discontinued and how they just do the Max and the commercial models.