A few years ago, I photographed and reported a one inch amorphous blob as being a large mold colony. It was a beautiful and brilliant yellow color and resided in a visible part of a condensate tray in a fan coil unit. This is the kind of unit that is seen in hotels, motels, hospitals and high rise bldgs.

A year later I saw it elsewhere and oncemore, reported it as mold.

A few months ago I discovered that there are anti-fungals and algicides that come as large tablets and are not packaged inside a small plastic packet.

These are called QUATS (quaternary ammoniacal tertiary.....) There is a brand of tablet (that does not disolve) that is brilliant yellow. Oh the angst.