Don't *know* that it's the brass; but process of elimination indicates to me it must be. It doesn't turn green when stored in one of those little long-needle plastic bottles from Schaff. Z! Reinhardt wrote: > Dear List-- > > How many of you have had the problem of Protek turning green when you keep > it in one of those valve-spout bottles with the brass fittings (available > from Schaff)? Is this caused by a reaction with the brass? Does anyone > know whether or not this discoloration affects the performance of the > Protek?
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