I will try a Magic Eraser on the steps. I know that my FC level is currently low and needs to be increased. I do not think it is mildew. There is discoloration of the pool liner all the way around the pool but not anything like on the pool steps. Just a side note is that the liner is being replaced this year. It is 21 seasons old and well past when it should have been replaced. Typically, as the pool season continues the line around the steps will go away but I wanted to remove it now rather than wait.
You are correct in that I just opened the pool. This is really the first weekend that I have been able to do anything with it other than opening it and getting everything operational. I have not done an overnight chlorine loss test. I have the TF-100 test kit. Is that kit sufficient for the overnight chlorine loss test? If not, where can I get the proper test kit for this check?
Overnight Chlorine Loss Test
fc levels for your cya FC/CYA Levels 
www.troublefreepool.com
Thanks for the advice on the overnight chlorine loss test. I will get that done this coming weekend.Yes - just follow the instructions
here
U will use the fas/dpd test (drops & powder) included in your kit.
If u pass the oclt - maintain target
and all other recommended levels
What Are My Ideal Pool Levels?
Use our tool to find ideal chemical levels for any swimming pool. Check TFP recommended levels on pH, free chlorine, cyanuric acid, and more.
If u fail the oclt - proceed with SLAM Process
Thanks Mdragger88. The pool steps looks great now.
