Green algae on concrete floor - removal tips?
February 10, 2008 4:55 AM Subscribe
Outside on the concrete floor of the back yard, it's all green and slippery. What to do to get rid of the algae?
posted by jamescridland to Home & Garden (13 answers total)
At least, I think it's algae. It's dark green, and slippy. And I don't like it.
Outside is normally shaded away from the sun, if that helps you to know. I'm kind of expecting to buy some liquid cleaner, like bleach I suppose, and brushing vigorously with an old brush, but I don't know if that's entirely the right thing to be doing.