It has 32 separate filters, about four-foot square, underneath the pool deck. I forget how many gallons they told me it takes--but something like 30 gallons of chlorine, would that be right?
It's Olympic-size AND with a week of rain and no sun it had to be maybe 59 degrees, but that didn't matter one bit. We swam and dunked and swam and screamed out loud at the frrreeezingness of it.