[rohrmann]

A couple months ago, we developed a strong sewer smell, and I checked everything. Found nothing, drained, flushed the black tank, and added double the treatment, with no change. I finally tried Odorlos treatment in both gray tanks. In a couple days, the smell was totally gone. The only thing I could attribute the smell to, was due to us being stationary for the last several months, and not getting the agitation of waste in the tanks. I have continued using Pure Power Blue in the black tank, and the Odorlos in the gray tanks, with excellent results.