Spectralight claims you can reduce free chlorine levels to 0.5 ppm if you use their equipment, which is quite expensive. I'd like to know more about this - anyone here experienced this approach? As a newbie to this forum, I'm not permitted to view the posts about Spectralight (such as 'CAUTION Leaf Pool Pumps or Eco Pool Pumps or...') that Google is suggesting (all I get is the 'you do not have permission to access this page' message). I'm seriously considering switching to the BBB method and want to use something like the Spectralight or other method to lower chlorine levels in our 10k gallon in-ground pool. Suggestions?