FROG® Serene Bromine Cartridge (Yellow) | Spa Refill Brand_ULTCOVER Pre-Treatment Checklist:

Pre-Treatment Checklist:

Please consult your stove’s user manual for more specific instructions on cleaning

Escape and enjoy

Phosphates enter from source water

Used for the connection of your hot tub's subwoofers

FROG® Serene Bromine Cartridge (Yellow) | Spa Refill Brand_ULTCOVER Pre-Treatment Checklist:The 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