On 2006-03-15, OmManiPadmeOmelet > wrote:

> muriatic acid. I double glove for that and wear a gas mask.

Does the gas mask do the job? Many gas masks and resperators have
filters for specific gases/particulates. You many want to check for
that particular gas.

> water comes from underground limestone caves.

I hadn't thought of muriatic acid. That would probably be perfect for
the ring from Hell that's getting the upper hand in my toilet.

nb