Background - this is my second full season of my pool. Last year I set the SWG to around 35% and it kept the pool clean and properly chlorinated all season. This year I've been bumping it up and up and up and I can't get my chlorine level above 1.0 and it's usually around 0.5. It's currently set at 95% and I'm fighting a small algae bloom. The only other point is that when the pool was opened, I had a massive scale problem. I did two no drain acid washes which cured my problem.
Anyhow, does anyone have any thoughts about why my SWG is not working? Could the scale problem have done damage to it? I did clean it with acid and saw a little "bubbling" but it looked pretty clean even before I cleaned it.