Check the listing for details. GLB Sequa-Sol - 1 qt.. Condition: New. Listed at 34.50 USD. Help prevent staining, scale and rust on pool equipment, pipes and fittings and keep your pool looking amazing. The sequestering agents in the Sequa-Sol formula agent hold iron, manganese, copper and calcium in solution so they do not react with other elements in the water. – Use weekly to prevent stains, especially after using GLB Stain Magnet. – Compatible with chlorine, bromine, ozone and salt water sanitizing systems. 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.