Millennium Cabinetry With a marble in a shower, you have to use specific stone cleaners to clean the stone- no harsh acid based cleaners. In a shower that is used every day, I would recommend sealing it yearly to be safe. If you have well water, in general the white marble is not a great idea unless you have a really good water softener. We also can recommend stone restoration companies that also offer cleaning of stones if you want a deeper clean done. Getchen Dorer - Dwyer Marble and Stone, Farmington Hills, Mi.