Pool FROG Mineral Reservoir 5400, and 3 Chlorine Bac Pac Cartridges Model 5051 for Inground Pools up to 40k Gallons;

Replacement mineral reservoir and chlorine bac pacs for in ground Pool Frog mineral purifiers. The chlorine bac pac is a convenient pre-filled chlorine cartridge that connects directly to your Mineral Reservoir and automatically adds low level chlorine support for 1-3 weeks. Replacement mineral reservoir contains a combination of minerals for controlling bacteria and adding sparkle to your water. Value pack includes one mineral reservoir and three chlorine bac pacs.