Check the listing for details. Natural Chemistry Phosphate Test 100 strips. Condition: New. Listed at 34.99 USD. The Natural Chemistry Phosphate Test offers 100 test strips and a diagnostic color chart for quick and easy results in seconds. Use as often as needed for accurate readings. Keep your pool in balance with this simple and convenient solution. 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.The Natural Chemistry Phosphate Test offers 100 test strips and a diagnostic color chart for quick and easy results in seconds. Use as often as needed for accurate readings. Keep your pool in balance with this simple and convenient solution. 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.