u/Ginzu19

This tile grows mold like crazy. It's porous and textured, I think the previous owners put it in the shower to prevent an elderly lady to slip, thought it seems to be an exterior type of tile.

We plan to renovate the whole bathroom in about two years so I would like to fix this without having to redo the tiling now.

I hope there is a sealant, resin, paint or something we can cover it with to prevent the tiles from being filthy. Please help

Edit: I do clean regularly with bleach, and it goes away. But it grosses me out having freaking mold all the time, normal tiles would never have this issue. Also cleaning products get stuck in the stone, so they never really look (nor are?) really clean