I bought a new home over the winter and just opened the pool a couple weeks ago to find the once white steps are now yellow due to copper staining. I also discovered that the previous owners used Pristine Blue! Not owning a pool in several years, I was not familiar with Pristine Blue, so after the pool was opened the pool company recommended Pristine Blue, which I bought and used (exactly as they had written down for me) now for a couple weeks. Yesterday, my son was swimming and his white shirt started turning green/yellow in spots. Anyway, between the yellow steps and stained shirt, I just want to switch from this Pristine Blue to BBB or Chlorine system. I have been reading about how to do it, I am still a little unsure. Any help would be greatly appreciated.