Hard water

Understand hard water

Recognise the signs, check the number and decide whether treatment is useful for your home.

Water treatment guides

Find the hard-water answer you need.

Find explanations of how each treatment works, what it costs and what you need to check before buying.

What hardness is, why it varies and what scale tells you.

Find the official supply-zone result and interpret it.

Separate cleaning from hardness treatment.

Match the household burden to the right response.

Compare units, reports, strips and drop tests.

Useful routines for renters and smaller budgets.