Rock waterfalls provide a soothing, tranquil surroundings when clean and correctly functioning. When calcium from hard water builds up on the stones, it can leave white residue known as limescale. There is no need for powerful chemicals that pollute your waterfall and give off unpleasant fumes. Clean stone waterfalls after every one to three months to prevent calcium buildup.
Turn off the waterfall pump and drain the water completely. Eliminate smaller stones and set them in the yard or on a flat surface for cleaning.
Dampen a scrub brush with warm water and a couple of drops of dish soap. Scrub the stones as well as other elements of the waterfall using the brush to remove as much residue and calcium buildup as you can.
Rinse the stones and components thoroughly with a garden hose. For big stones, use a pressure washer to blast away the buildup.
Pour full-strength white vinegar on any residual salt stains. You can also use a paste made by mixing baking soda and vinegar. Scrub the stones nicely to eliminate any residual buildup.
Rinse the stones thoroughly using a garden hose and drain the water completely before refilling the waterfall or fountain. If you eliminated the stones for cleaning, then replace them before refilling the waterfall.