How to Tell If Mineral Buildup Is Really Behind Low Faucet Flow — and What to Do About It

https://oscar-wiki.win/index.php/When_DIY_Confidence_Meets_Decision_Fatigue:_A_Case_Study_of_One_Homeowner%27s_Struggle_with_Ongoing_Upkeep

Short version: don't assume that a slow faucet equals hard water. Test smart, not loud