
Since this pool shock uses a stabilized form of chlorine, it may increase CYA levels.


Clorox Pool & Spa XtraBlue Shock is an effective and popular treatment option that targets common algae species while eliminating bacteria and chloramines. Type: Granule | Amount: 12 pounds | Chlorine level: Not applicable | Dissolve time: 24 hoursĪn algae bloom is one reason why you may need to use pool shock, since pool algae can grow quickly, leaving a furry trail of green, black, or yellow slime on the surface of your pool steps or in the corners-basically anywhere water circulation may be more limited. The dissolve time can take up to 24 hours, but testing your pool’s water chemistry is the easiest way to know when it’s safe to swim again. You should use a pool brush to fully dissolve any granules that settle at the bottom of the pool. Nevertheless, you need to monitor your water for calcium hardness, as high levels can lead to scale on your pool's walls, steps, and water features.ĭosing and applying HTH Pool Care Shock Advanced is simple since each 1-pound pouch of granules treats 13,500 gallons of water. It's worth noting that this particular formula doesn't contain cyanuric acid (CYA), which can cause chlorine lock. Depending on your water chemistry, we recommend this pool shock because it can be used in chlorine, saltwater, and bromine pools, and it contributes to clear water while eliminating chloramines, bacteria, and algae. This popular pool shock treatment uses calcium hypochlorite (cal-hypo), a bleaching agent and disinfectant. Keep your water safe and swim-ready with the help of HTH Pool Care Shock Advanced.

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