Quick and easy determination of carbonate hardness. Features: • This test strip is for the rapid and reliable determination of alkalinity or carbonate hardness in water. • The easy dip-and-read-procedure provides a reliable result within 30 seconds. • Carbonate hardness or alkalinity is a measure for the waters pH-buffer capacity. • If the Carbonate Hardness is higher, addition of acids or bases will have a lower influence on the resulting pH. • Sudden and rapid pH-changes of the water are avoided. • QUANTOFIX® Carbonate hardness is used for the quick and easy control of water in swimming pools and aquariums. Specifications: • Presentation: Tube of 100 strips • Color reaction: bright green → blue • Gradation: 0 · 3 · 6 · 10 · 15 · 20 °d