BioGuard Instant Stabilizer 100 | Pool Stabilizer

BioGuard Instant Stabilizer 100 is a liquid chlorine stabilizer that goes to work immediately — and the difference between it and granular stabilizer is bigger than the format suggests. Conventional granular stabilizer is cyanuric acid, and it behaves like one. It's strongly acidic, it dissolves slowly — commonly four to seven days — and much of that time it sits undissolved in the filter or against pool surfaces. That's why granular stabilizer comes with a list of handling rules: no backwashing for 48 hours, don't let it rest on the finish, wait days before retesting. Applied carelessly, it can damage a pool surface or the circulation system. Instant Stabilizer 100 is a different chemistry entirely. The active ingredient is monosodium cyanurate — a salt rather than an acid, with a pool-friendly pH. It won't damage pool surfaces or equipment, it dissolves on contact, and it protects chlorine immediately instead of over the following week. The job it does is the same one every outdoor pool needs. Ultraviolet light is the single largest drain on free chlorine, and unprotected chlorine can lose a substantial share of its strength in a matter of hours on a bright day. Stabilizer bonds loosely with free chlorine, shields it from UV, and releases it as the chlorine is consumed doing real work. Chlorine consumption and maintenance costs both drop, and chlorine generators run more efficiently because the cell doesn't have to work as hard to hold a level. Dosing is simple and linear: 4 fl oz per 10,000 gallons raises cyanuric acid by 1 ppm, so a full gallon raises a 10,000-gallon pool by about 32 ppm. Pro Tip: Test cyanuric acid before you buy, and skip this entirely if you feed with trichlor or dichlor. Chlorinating tablets, sticks, granular dichlor sanitizer, and dichlor-based shock all add cyanuric acid every single time you use them — a pool on tablets typically reaches its target stabilizer level on its own within weeks and keeps climbing all season. Adding stabilizer on top of that is how pools end up locked up in August. This product is for pools starting from a fresh fill, pools using unstabilized chlorine like cal hypo or liquid, and salt generator pools. If you're on tablets, test first and you'll likely find you need none at all. Brand BioGuard®