Was talking to a new pool owner today. Asked him how it was going. He told me everything was going great with his pool but now its a little cloudy and he has been fighting "stuff" on his steps. He has a vinyl liner and uses trichlor. He was told that the "stuff" is likely related to metals or phosphates. The pool store has him adding everything EXCEPT chlorine. I asked him what his CYA level is and he looked at me like I had 4 heads.
I directed him to this site and told him he likely has algae, needs to get a good test kit and figure out his CYA....which is likely through the roof.
He said he was about ready to fill in his pool with dirt!!