Bricks, Masonry, Asphalt and Concrete - Cleaning Mildew from front entrance steps

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09-13-00, 09:17 AM
I need to remove green mildew mfrom the front steps of my house. I understand that acid can not be used on limestone slabs. What can I use?

09-13-00, 09:31 PM
TSP or ammonia (household sudsing type not aqueous - it's too dangerous)
09-14-00, 12:05 PM
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by 2000:
TSP or ammonia (household sudsing type not aqueous - it's too dangerous)<HR></BLOCKQUOTE>

Many Thanks. Appreciate the reply