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1 x Sundance Spas 6500-520
That's why a factory-spec cartridge matters: correct filtration area and flow keep your filtering efficient
add 2 tablespoons (30ml) warm water
Dimensions 7 3/8" x 5 7/8"
FROG® Serene Bromine Cartridge (Yellow) | Spa Refill Type_Control 1 x Sundance Spas 6500-520The FROG Serene Bromine Cartridge is the consumable yellow cartridge for FROG's bromine based Serene system designed for hot tub owners who want the cleaner, gentler water of a mineral and bromine program without the daily fussing of traditional bromine dosing. Each 150g cartridge lasts 2 to 4 weeks depending on spa size and use, releasing bromine at the rate you set with the adjustable dial. This is the standard single cartridge refill what you