Green algae in my pool

Question
I have a above ground outdoor pool and it has green water now. It was crystal clear two weeks ago. I've tried a few different chemicals to try to save the pool no luck. Help!!!!!!!!!!
       Thank you in advance!
       Ken  

Answer
Hi,
Did you do a backwash on it? Also, you could try to put some muracic acid into it hopefully should solve the problem. Also you can shock the pool as well. If all else fails - your going to have to drain it :(. Sorry about that one. Ask for a followup if needed.
Max Hester WSI,LGI