Instruments Direct Single Parameter(s) Water Hardness pH Test Strips - 50 strips

From Instruments Direct, a pack of individual hardness test strips designed for measuring the calcium and magnesium mineral levels in the water. The water hardness test strips are made from a thin plastic material and a tip treated with a chemical that changes colour when immersed in water. These testing strips are easy to use and provide accurate results within 10 seconds.

Colour chart