I have a large (18’x40’) above ground pool and would like to get a robotic cleaner for it. The cleaners I have been looking at are all for in-ground pools, as they seem to be the only ones large enough for my pool. Is there a reason that you cannot use an in ground robotic pool cleaner in an above ground pool? I was also looking at the Polaris 360 as I have a larger 1.5hp pump with my pool, but this is also for in-ground pools. Any suggestions of what I should use?