Hello everyone. I am under contract to buy a home, this home has a pool/spa combo. It is a salt water pool as well.
The concern I have is that the coping is sand stone and shows signs that it has half way eroded away about 3 of the stones, in fact the grout is above those stones.

The seller says that he was not told that could happen from the person that sold him the home. So he told my inspector that once he noticed this, that he went to the home depot and bought some kind of a sealer and sealed the stone. He does this about every 6 months. Does this sound right?

thank you all in advance for your help