negative on the bleach and water. The bleach you buy at the store is 50/50 water and bleach. You spray that on there and you'll just make it worse. Drop by HomeDepot and somewhere in the paint section is Mold remediation spray. Several Brands, Mold Armor is the one we're currently using on mold situation we have in our rental. The Servpro local to me came out at my request to see what, if anything, else we needed to do to remove the mold. They said the Mold Armor product l had was equivalent to what they spray in large remediation jobs. But finding the source of the mold was far more important. We had to remove tile and linoleum to find the water leak that was causing ours. My rental too is on blocks and the leak was coming from 6 feet away. Soooooo l'd look into the cause first, then adjust from there.
Good luck with the tenants. Mine is my sister and her husband and they caused the leak so l'm getting SO much cooperation from them it's making this situation a breeze for me.
