I used the Behr bleach deck cleaner. Dont remember exactly. But before I moved in the deck was never taken care of in 15+ years! There was green slime all over. Unbelivable! So I added the bleach with the power washer and everything had come off.
Aside from the steps already fading, the deck portion is starting to show signs of mold coming back. I only used 1 coat (I think).
Heres what I used to stain. http://tinyurl.com/22w7k