Spa Frog Bromine Cartridges x 12

Directions Drain and refill your hot tub at least every 4 months. Clean and replace filter cartridges when dirty. Balance water as follows: PH: 7.2-7.8, Total Alkalinity: 80-120ppm, Calcium Hardness: 150-250, Total Dissolved Solids: <1500, Free Bromine: 3.0-5.0ppm. Before using cartridges, establish an initial residual of 3-5ppm bromine or chlorine. Set the blue conditioning cartridge to wide open on #6. With a freshly filled spa, initially set the yellow bromine cartridge on #5 for the first 24 hours ONLY. For the first week or so, before each use, test the water and adjust the cartridge by 1 setting per day until the bromine stabilises to at least 3ppm. Insert both cartridges into the green floating holder and let the Spa Frog System free-float in the spa. Remove and drain the SPA FROG system when using the spa, then place it back in when finished. Replace the blue conditioning cartridge every 4 months, or when draining and refilling your hot tub. Replace the yellow bromine cartridge when empty, usually every 2 to 4 weeks. Drain water to ensure the cartridge is empty, then discard to general waste.