LaMotte Hardness 1 Reagent, 60 mL | P-4259-H Pool Cover Pumps Use this product after testing

Use this product after testing your spa water to bring pH into balance

Seals 2-Inch connections to prevent leaks and maintain steady water flow in pool systems

Replacing it restores the water-side path where the heater actually transfers heat

Whether you're upgrading your existing system or replacing an old actuator

Homeowners with round above-ground pools measuring 18–21 feet in diameter

LaMotte Hardness 1 Reagent, 60 mL | P-4259-H Pool Cover Pumps Use this product after testingLaMotte P 4259 H Hardness 1 Reagent 60 mL LaMotte P 4259 H Hardness 1 Reagent is a pool water testing reagent designed to measure water hardness. This 60 mL bottle is used with compatible test kits to determine calcium hardness levels in pool water. In routine pool maintenance, this reagent supports accurate readings and helps you keep pool water balanced. Key Features 60 mL reagent bottle for convenient use and storage Hardness 1 reagent for pool