Hello - We will be starting a new pool soon. The pool will be about 17000 gal. I know I need to oversize the swg but is there such a thing as overkill? The pb uses pentair equipment. They seem to oversize everything say it does not cost that much more. My question is should Ijust go with the biggest IC60 or should I go with the IC40? The pool is going to be just a pool, no spa and no control system for now.