Nature2 W20171 Express Mineral Pool Sanitizer, Above Ground
- Includes one Pool Frog mineral reservoir cartridge and three Pool Frog Bac Pac's.
- For in ground pools up to 40,000 gallons.
- Pre-filled cartridges for no mess, no guess and no stress pool care.
- The Mineral Reservoir lasts all summer or 6 months whichever is shorter & Kills bacteria with up to 50% less chlorine.