For some reason when I heat up our raised, attached spa, the water becomes cloudy. It remains clear if I run it without the heater. Does this make any sense? If I look carefully, it looks like tiny white particles floating around, which I assume is DE??
I picture the inside of a heater simply as a waterway that has water running through it whether its on or not, and the burners just apply heat to those pipes? I could see if it only happened once or twice, and maybe had some DE in there from a previous torn filter grid, but it does it every time! Any input would be appreciated.