HOTUBJOY 4 Hot Tub Filter Spa Mineral Cartridge Stick Compatible with Hot Spring Spas Freshwater System

Low maintenance lasts up to 4 months,for spas up to 600 gallons/2200L.
Exclusively customized design for fits hotspring hot tub filter,compatible with hot spring spas freshwater salt system.
Hot tub minerals controlled release technology(CRT) ensures optimal minerals levels and spa water maintenance.
Brings you crystal clear hot tub wateBrings you crystal clear hot tub water:improves water quality,softer water,reduces stinging eyes and skin irritation.r:improves water quality,softer water,reduces stinging eyes and skin irritation.
Just simply insert the mineral stick into the hot tub filter or filter standpipe,add onto your preferred water care system for the best spa water.