Want to be fancy? Buy a water hardness test strip kit at any hardware store. Dip one in water, wait for it to change color, and match it to the little chart. It’s like a mood ring for your H2O.
Water Hardness Test Strips - How To Test For Water Hardness? - YouTube
Red usually means hard. Blue means soft. It’s that simple. No math required, unless you count matching colors to numbers. And if you can’t match colors, maybe test your vision first, not your water.
