HTH Sun Defense Stabilizer Pod 4 lbs. for Pool Water (Pack of 3)HTH Stabilizer Pods help protect and extend the life of chlorine in your swimming pool. If you're using an unstabilized chlorinator, adding this pool stabilizer can help resist the effects of direct sunlight on the pool chlorine levels. Easy to use; all you have to do is drop these HTH chlorine tablets into the skimmer. HTH chlorine tablets stabilizer makes pool care easier than ever. Keep your CYA levels between 20 and 40 ppm and your free available