Hard water is measured in grains per gallon (GPG). 1 GPG is fine. 7 GPG and above? Your shower head is crying mineral tears.
To test hardness, buy a $10 kit. Or look for white crust on your faucet. That crust isn’t elegant—it’s witness to a plumbing crime.
If you have 10+ GPG, you’re not just buying a softener. You’re buying a peace treaty with your appliances. Your water heater will thank you by living longer.
