When looking for an alternative to the traditional sanitizer, Paradise Pool Supplies has what you are looking for! With our NATURE 2 brand we carry NATURE 2 SPA STICKS, NATURE 2 CF, NATURE 2 EXPRESS, NATURE 2 EXPRESS REPLACEMENT CARTRIDGES, NATURE 2 G REPLACEMENT CARTRIDGES, NATURE 2 G VESSEL and NATURE 2 ABOVEGROUND A SANITIZER. Our SPA STICKS come in a single pack, two pack, four pack, eight pack or twelve pack of replacement cartridges. They last for four months and makes the spa easy to manage! Significantly improves the look and feel of the water! Our CF includes the CARTRIDGE FILTER PURIFIER either single or in a six pack. This system requires no electricity or moving parts, its actually powered by the water. It kills bacteria on contact and is faster than chlorine. The EXPRESS includes the EXPRESS PURIFIER with or without the CARTRIDGE. This sanitizer uses minerals to destroy bacteria and algae. Its easy to use, just install the sanitizer at your pool's return line, activate the cartridge and let it do the rest for you! All you have to do is sit back and relax! The G VESSEL includes the 2" NATURE2 INGROUND PURIFIER w/ cartridge, which comes in 25,000 gallons, 35,000 gallons and 45,000 gallons.We also sell the NATURE2 G VESSEL REPLACEMENT CARTRIDGES. The NATURE 2 ABOVEGROUND A SANITIZER includes the NATURE 2 ABOVEGROUND POOL PURIFIER w/ cartridge, the REPLACEMENT CARTRIDGE in single and four pack. We have everything you need for your alternative sanitizer needs!