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The granules are totally soluble
Durable Construction: Built to withstand the heat and operational demands of hearth environments
and Concord grapes
Measures -40°F to 572°F (-40°C to 300°C)
FROG® Serene Bromine Cartridge (Yellow) | Spa Refill Type_Control The granules are totally solubleThe 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