HTH 52015 Shock Treatment Bag, 13.3 Ounce Clearance Removes dried Portland cement grout

Removes dried Portland cement grout haze and mortar residue from tile

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

2 caps & two 3/8" hex nuts

Thermoplastic top and body are virtually unbreakable

HTH 52015 Shock Treatment Bag, 13.3 Ounce Clearance Removes dried Portland cement groutShock 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