Some tips for removing hard water calcium are to rinse or wipe down fixtures regularly to remove mineral deposits and install a reverse osmosis filter. These filters can be installed at just one or two fixtures in the home or can be installed to service the whole house.
One tip to cut down on calcium deposits on chrome, copper or brass faucets is to scrub them with lemon juice or half a lemon. The citric acid loosens the limescale and makes it easier to rinse away.
Vinegar has long been used to remove tough stains caused by mineral deposits. The vinegar should be sprayed or wiped on the fixture and allowed to sit for a few minutes before it is rinsed away. The homeowner can also wrap a vinegar-soaked cloth around the fixture and let it stay for a few hours before rinsing. A paste of vinegar and baking soda is also used to get rid of stubborn stains.
If an aerator can be removed, it can be cleaned with an old toothbrush or allowed to sit in a cup of vinegar for a few hours before it is scrubbed and rinsed. Vinegar is also run through appliances such as irons, coffee makers and dishwashers to prevent limescale.