We've had issues with mold in a couple of houses in our community - and in the community common building basement.
There was a professional mold remediation crew that worked in one of the houses - and they used something called Concrobium. I found a 'recipe' for making my own concrobioum in the Amazon reviews of the commercial product. I saved it into my 'recipes' section on Google Drive (including figuring out weights so I could 'scale' quantities up and down).
I use one of those pump-up spray bottles to apply it.
Note that if your wall is stained, this does not remove the stain - it just kills the mold.
Hope it helps someone out there. I just used 6-ish gallons to treat the basement of our common building. Waiting on the 'official' results (outside testing) but it seems better.
1 qt (950ml) water
⅛ tsp (.75g) TSP
2 tsp (12g) Washing soda
1 gal (3800ml) water
½ tsp (3g) TSP
8 tsp (64g) Washing soda
……………from the review………………………
To those who say it doesn't work: Please try it again, and follow the directions explicitly. This chemical depends on physical action (crystallization) to break apart the mold molecules and "disarm" them. It must be saturated, then dry in place to have this effect. You can catch the runoff, but don't dry the surface, just wipe it lightly. This stuff doesn't "poison" the mold chemically, like bug killer does to bugs, but "cracks" it apart, like ice expands when it freezes. Used properly, this stuff is magic.
I live aboard my boat in Savannah, Georgia, and it controls mold beautifully in very heavy heat and humidity.
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So, the solution is 2 teaspoons of Washing soda (available at the supermarket with other detergents) per quart of water, and then 1/8 teaspoon of trisodium phosphate (TSP). This is available at Home Depot and other hardware stores, and is used as a cleaner or paint preparation. Just look in the paint section at HD. Both of these are very inexpensive. Under $10 for both, and you could make 50 gallons or more of mold control.
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Finally got the test results: basement air has the same mold concentration as outside. The stuff worked. I think I spent under $30 total (major expense was the 2gal pump-up sprayer).
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