This is because these cleaners contain acidic materials or chlorine both of which can permanently damage your marble countertops or marble floors.
Bleach damage marble.
Most commercial bathroom cleaners are too harsh to use on marble and they can etch or otherwise damage the surface.
Before you apply the diluted bleach it is important to thoroughly wet the area with clean water.
You can remove mold with a diluted bleach or peroxide solution but it s best.
The damage from bleach stems from an entirely different characteristic.
When marble is damaged.
Bleach can be used sparingly in certain situations in a very very dilute solution but more often than not people get the mix wrong and etch their marble.
On light colored marble you can dilute one quart of bleach with one gallon of hot water or for a small area a size appropriate 4 1 mixture to remove the stain.
Etching is corrosion that eats away at the marble which will cause dull and light colored or clear spots.
Bleach is alkaline so it doesn t pose the big risk of acidic cleaners which dissolve sensitive stone including marble.