BerniceC: would You want to paint the concrete once You got the mold off? i know they make fungicide or moldicide or something that You can stir into paint and then when You paint the surface the mold shouldn't come back...
(trying this new reply box function for the first time - please forgive me if it does something weird i don't expect! )
(hide) If you want to play a game with an opponent of a similar level, you can define a required BKR range for a new game invitation. Then nobody with a BKR outside this range will be able to see/accept it. (Katechka) (show all tips)