In The Swim Deluxe Pool Opening Chemical Start Up Kit - Up to 15,000 Gallons Formulated, pre-measured kits contain essential spring startup chemicals for pools up 15,000 gallons Chlorine shock eradicates bacteria and other contaminants Stain, rust and scale preventer removes mineral staining and scale Non-Metallic algaecide kills algae while the clarifier enhances filter performance and test strips measure free chlorine, pH, total alkalinity, and cyanuric acid (stabilizer) Special Shipping Information: This product may not be available for 1 or 2 day shipping due to federal regulations that require it to ship via ground ship methods only. This product can only be shipped within the 48 contiguous states.