The Instant FROG Mineral Sanitizer Package fits seamlessly in your skimmer basket and delivers FROG’s fresh sanitizing minerals for 6 months. These minerals effectively kill bacteria and reduce chlorine use by up to 50%. That means the harsh effects of chlorine are out, and a season of pool fun is in. Prefilled for no mess, no guess, and no stress – it’s an easy, efficient choice for a clean, safe pool.