Rated 4.4 out of 5 stars.
Pool owners, keep your water balanced with this Taylor hardness reagent refill.
It's a 2-ounce bottle of testing solution used to measure calcium hardness in your pool or spa – super important for preventing scale buildup or corrosion.

Just add it to your water sample in a Taylor test kit (or compatible kit) and match the color to get your reading.

Easy instructions, no fancy tech needed.

Since reagents can expire or run out before the rest of your kit, it's smart to replace this one every season.

Made in the USA by Taylor, a trusted name in water testing for decades.

A must-have for maintaining clear, safe water all summer long.