Coast Spas' hydro cyclonic filtration system is the only commercial grade system for portable spas. At 175 sq. ft., it has a filter that is larger than any other hot tub on the market. Likewise, independent lab testing of hydro cyclonic filtration vs skim filtration has proven Coast Spas' filtration to be 83% faster and 20% more effecient. If you are looking to buy a new hot tub, ensure that you and your family have the cleanest hot tub environment possible. Stop in and check out the Coast line up at Port Alberni's only hot tub store, The Comfort Zone.