Aqua Spas - #1 Dealer of Hot Tubs and Swim Spas in Fort Collins, Greeley, Longmont, Castle Rock and, Aqua Spas is the #1 rated dealer of Hot Tubs, Swim Spas, and more in the Fort Collins, Greeley, Longmont, Castle Rock and Broomfield area!If you want to save big on a top rated backyard vacation, then come see us!.