The Nature2 A30 Replacement Cartridge works for 5,000 to 30,000 gallon above ground pools.Please Note: This Nature 2 A30 Replacement Cartridge W28165 contains one replacement cartridge. This is a single unit cartridge for the Nature2 A30 Replacement Cartridge W26765 four pack. Limited Cartridges (three posts) fit in any vessels. Standard Cartridges (two posts) only fit in standard vessels. May ship out as the W28166.
- Replacement mineral cartridge for all A vessels
- Destroys bacteria and controls algae using natural minerals
- Reduces potential for stinging eyes, skin irritation, and unpleasant odors; helps stabilize pH levels
- Will not harm pool equipment or stain pool
- 6 month GUARANTEE, Kills bacteria, controls algae