Does anyone run a apf600. I just got one off of craigslist, took it home and the recirculating pump is trashed. Go figure, I guess that's the risk of buying used sometimes. I was looking to rebuild it but it seems that it's not really worth rebuilding because it will happen again soon. Sooo I'm hoping for some help on retro pump or just thinking about putting a bubble blaster on it and plumbing it in somehow, but I'm not really sure what size or what route to take.