Pumice Stones
Pumice stone are used to remove the scale from tiles and other deposits or
stains from plaster surfaces without scratching them excessively. The soft
pumice stone is made from volcanic ash and is used for its abrasive action.
Pumice stones are sold as blocks, and as small bladed stones that attach to your
telepole for reaching tight spaces and underwater depths. Since pumice stones
disintegrate, it is advisable to scrub before you vacuum clean the pool. A good
alternative to pumice, which scratches easily on fiberglass, is a block of
Styrofoam or similar plastic foam.
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Cleaning