The Nature2 Express by Zodiac is a mineral sanitizing system for above-ground and in-ground swimming pools that reduces the need for large amounts of chlorine. It works by harnessing the sanitizing antimicrobial properties of natural minerals, which means fewer harsh chemicals in your pool. During the regular pool filtration cycle, water flows through the Nature2 Express cartridge, where the combination of silver and copper minerals destroys bacteria and prevents algae. This proven system allows you to reduce chlorine use in your pool by up to 50%, resulting in less potential for red eyes, itchy skin, and unpleasant chemical odors. It’s eco-friendly and family-friendly. Nature2 is guaranteed to kill bacteria and control algae, and it will never stain. Each cartridge lasts up to six months. It’s called Nature2 Express for a reason – it’s fast and easy to install! Everything you need is in one box, even the drill bit. Drill just one hole and you’ll be using less chlorine in minutes. This pool season, be good to yourself and get cleaner, clearer, softer water with Nature2 Express.