HTH 52015 Shock Treatment Bag, 13.3 Ounce Clearance GFCI lock-out function protects from

GFCI lock-out function protects from incorrectly wired line-load connections and GFCI circuitry damage

Silent spring powered

tinted glasses and hard shell carrying case

Absolute barometric pressure with 12 hour history graph (inHg or hPa)

HTH 52015 Shock Treatment Bag, 13.3 Ounce Clearance GFCI lock-out function protects fromShock treat your pool at least once a week to kill unwanted bacteria and algae. Shocking gives your pool the boost of chlorine it needs to keep the water clean and clear. Highlights: Size: 13. 3 Ounce Effective, multi purpose product that sanitizes, clarifies, helps prevent algae in your pool, convenient Easy to use Won't over stabilize your pool For crystal clear pool water Follow our HTH 4 step pool care program: step 1: test & adjust pool water