Spa Choice Bromine Tabs fit in most spa feeders and floaters to continuously sanitize your spa or hot tub. Bromine is a powerful and effective sanitizer like chlorine, but it is odorless and less irritating to your skin and eyes. Spa Choice bromine tabs are "pre-stabilized," so your water is silky smooth without using a stabilizer or conditioner. DIRECTIONS FOR USE: Keep pH between 7.2-7.6 and never allow it to fall below 7.0. The treatment necessary for your pool or spa will change considerably depending upon those factors that burden the disinfection system. Some of the factors that will vary the required treatment are water temperature, bather load, exposure to windblown debris, thunder, rain storms, and length of filtration cycle. Users must wear chemical-resistant gloves while placing the tablet in the spas. FOR USE IN SPAS AND HOT TUBS: Before initially using this product in your spa or hot tub you will need to add 1/2 oz. of sodium bromide for each 100 gallons of water. The same treatment must be followed each time you drain and refill your spa or hot tub with fresh water. Introduce 3 tablets per 300 gallons of spa water with the use of a floating tablet feeder or automatic brominator installed on the spa equipment. Adjust tablet feeder or brominator to obtain an active bromine residual of at least 2 ppm. Maintain spa by adding 3 tablets per 300 gallons every 5-7 days or as needed to maintain an active bromine residual of 2 ppm at all times. Spa water has a tendency to foam and cloud; this is directly proportional to the amount of spa use. Cloudiness is due to the accumulation of body fats, oils and contaminants too small for the filtration equipment to remove, and is linked to rapid escalation of total dissolved solids in the water. To a great extent, defoamers, clarifiers, as well as shock treatments, demineralizers, or sequestering agents can be used to clear the water. When water clarification cannot be achieved, drain, clean, and refill the spa.