We have since the beginning of this problem, have changed out the
brightner lines and replaced them with new lines.As they were coated on
the inside with black (assuming fungus). The new lines were installed
inside black conduit tubing. The tubing was for the idea that the fungus
was growing from light exposure.

The size of the nodules are around .1 to .2mil, extremely small in fact,
too small too cross section and evaluate. 

Sombody recommended at one time to add a small amount of copper sulfate
solution, do you have any comments on this?

T. Gaylor 

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