If a stone fountain has a copper basin, chances are the stone may get green discoloration. The hard, green deposits are a combination of calcium deposits from the water and copper from the basin. The easiest way to remove them is to use a pressure washer. Be sure to test the pressure washer on an inconspicuous area, since too high a pressure may cause the stone to break apart. We recommend 900 psi. Another method would be to sandblast the deposits from the hole with a micro-blaster. This is a small sandblaster similar to an air brush. When you are done removing the large portions of deposits a mild acid wash should remove the remaining deposits.
Article ID: 921
Created: February 3, 2026
Last Updated: February 3, 2026
Author: Admin
Online URL: https://surfacecarepros.com/kb/article/how-to-remove-stone-fountain-calcium-deposits-921.html