I have a commercial 30K gallon pool with a gravity fed filter system. The filters are a series of round disks in an open basin in an sub-level pool house. Could I get a recommend on which SWG would work best? And thoughts on how to convert? As a side note, I'm getting quote to move the equipment to a location further away from the pool (and do away with the pool house). In this case I would switch to a sand filter as well as SVG. Thoughts?