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This video demonstrates the simple process. It’s child’s play!
The more droplets required, the harder the water.
If the water discolours after 1 drop* – your water is as soft as soft can be.
- 4 drops = Passable (you should still just about get bubbles in the bath)
- 8 drops = Moderately hard (will wash the daylights out of your skin and clothes)
- 12 drops = Exceptionally hard (a helmet in the shower is recommended)
*1 drop = 20 parts per million (ppm)
The hardness of water is determined by the milligrams of calcium carbonate per litre and is reported it in parts-per-million (ppm). In general, water with less than 60 ppm is considered soft, water with 60-120 ppm is moderately hard and water with greater than 120 ppm is hard.