We've been using BBB method for 2 years now and all has been well. Pool was opened a few weeks ago and test have been normal. I've been adding the usual bleach as I did in the past. I noticed cslight cloudiness would stirup when I brushed the bottom in some spots so I put in some algaecide I had left over from last year. 2 days later the white plastic steps are now grey. I tried wiping and brushing them for a few mins but it isn't coming off.
Anything I can do to fix this?