I'm right now at Canada and I just love gardening. I used to try different varieties of gardening and recently I bought few container plants and grew them in separate containers. As you all know winter is nearing and it's cold during late evenings. I placed the containers near a concrete wall from the time it was bought. Yesterday I found something like green algae formation in the concrete walls. I just moved the container and was shocked to see the wall covered with green algae. I tried to remove it but it was very difficult to get rid of their marks. I found an online article containing information about cleaning up green algae http://www.sunrise-cleaning.com/blog/cleaning-tips/tips-removing-green-algae-concrete-walls/.
I tried those steps and removed the green algae from the wall. But my wall has turned green and it doesn't look good. Do you guys have any idea to cleanup the green algae completely off the wall? Any suggestions are greatly welcomed. Thank you.