How do you remove calcium/lime deposits from water fountains?
You can usually remove calcium deposits with a weak acid such as lemon juice or vinegar. It may take repeat applications to dissolve the lime.
Using distilled water would certainly prevent redevelopment of the calcium deposits. The amount of lime dissolved in your water supply will affect how quickly deposits build up. If your water is very hard (lots of lime in it), the deposits will build up faster. In most cases, it's not necessary to use distilled water in fountains, either indoors or out.
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