The FROG®Filter Mate® changes the way you care for your hot tub. For spas up to 600 gallons, your Filter Mate slips right into your hot tub’s filter, creating Fresh Mineral Water® on the very first day. Add your choice of bromine or chlorine to sanitize your water — with 50% less of these chemicals needed for fantastic results. You’ll have water that looks and feels amazing for up to four months before a replacement is needed. Experience unmatched ease of maintenance with the FROG Filter Mate.