[PowderMonkey]

Clorox chlorine bleach. Recommended to me by a plumber several years ago. He said if used regularly, it works better than Draino or Liquid Plumr. Won't hurt pipes. Breaks down soap scum, glutenous paste build up from potatoes, rice, etc., and dissolves hair. If the fungi can survive it, they can have the house.

[greeneyes]

Works for clogged toilets too. I accidentally flushed a cloth diaper back in 1967. Hubby tried a lot of things to unclog it.

Finally we just poured a gallon of bleach into the bowl and left it overnight. Next morning the toilet was totally fine. It flushed with no problem.

[jurroppi1]

First thing I thought of too, so I did some digging. Clorox works for some fungi on non porous surfaces (most drains are PVC now, so that should work on the few fungi they claim it will kill on non porous surfaces). I just don’t know that it will kill this.

Thanks for the response.