Now I'm thinking about getting a cheap Intex 12' x 30" round. My dog needs therapy, and I'm looking for something that will last a few months. I have heard that the pump that comes with the pool usually does not last more that 30 -60 days then it dies, just under warranty. I do not want a sand filter system. I'd like to use the Unicel cartridge Is there another third party pump, that's not too costly, I can purchase and hook up to the small pool?