Empty your fountain completely and wash it once a month. A wet/dry vacuum will help with this task if your fountain does not have a built-in drain. Wash the fountain surfaces with a scrub brush and warm, soapy water.
Dismantle the pump according to the manufacturer’s directions and soak the parts in a solution of 2 cups of white vinegar for every 1 gallon of water. Use a toothbrush to dislodge any stubborn dirt. This vinegar solution can also be used on any stains on the rest of the fountain that the soapy water failed to remove during the fountain cleaning.
Fill the fountain with distilled water. If the fountain is large enough to make distilled water expensive or impractical, use water collected in a dehumidifier or gathered in a rain barrel. Unfiltered tap water is the worst water source you can use to fill your fountain when trying to avoid deposits.
Run the water pump in your fountain continuously except when cleaning it. The continuous water movement reduces mineral and sediment buildup and is easier on the pump than daily shutting down and restarting.