Bullfrog Hot Tubs are Unique! Bullfrog's spas are the world's only hot tubs equipped with the patented JetPak System? of modular hot tub jets. JetPak? technology delivers incredible power, maximum versatility, and allows you to upgrade your spa's jetting with new JetPaks, both now and in the future. Because of the innovative JetPak System?, Bullfrog Spas are completely customizable and upgradeable, are virtually leak-proof, and are extremely energy efficient. Bullfrog Spas use 90% less plumbing and we have eliminated diverter valves, which, gives Bullfrog Spas more pressure and more powerful jets than the competition. Bullfrog Spas are constructed using state of the art manufacturing technology and the most advanced and durable materials available to ensure that you experience years.