Check the listing for details. Natural Chemistry Spa Oxidizing Shock 3.15lb.. Condition: New. Listed at 35.99 USD. Natural Chemistry Spa Oxidizing Shock is a powerful and gentle oxygen-based oxidizer that quickly dissolves for easy use on spa surfaces. With no added chlorine or other sanitizers, it is a great option for routine disinfection. Compatible with both chlorinating and brominating products, it offers an effective and safe oxidizer treatment. SHIPPING: We will do our best to ship your order based on the shipping method selected, however in some cases, your shipping method may need to be modified to meet shipping requirements based on the carrier. Our current carriers used are UPS, FedEx and USPS. Please contact us directly through the "Contact Seller" link if you need UPS, FedEx or USPS specifically for your order.Natural Chemistry Spa Oxidizing Shock is a powerful and gentle oxygen-based oxidizer that quickly dissolves for easy use on spa surfaces. With no added chlorine or other sanitizers, it is a great option for routine disinfection. Compatible with both chlorinating and brominating products, it offers an effective and safe oxidizer treatment. SHIPPING: We will do our best to ship your order based on the shipping method selected, however in some cases, your shipping method may need to be modified to meet shipping requirements based on the carrier. Our current carriers used are UPS, FedEx and USPS. Please contact us directly through the "Contact Seller" link if you need UPS, FedEx or USPS specifically for your order.