Unexpected warm water failings prevail as storage tanks age; mineral accumulation from hard water in parts of Geelong lowers

https://academy.educause.edu/eportfolios/12410/home/reasons-why-homeowners-trust-plumbers

Unexpected hot water failures prevail as tank age; mineral build-up from difficult water partly of Geelong reduces efficiency, causes rolling noises, and can cause leaks or uneven water temperature levels.