Black flim on toilet tank

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Karenb

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I, too, have a low flow toilet and the tank has that black film on it and now it is interfering with the flushing mechanism. It is always getting stuck and it keeps running. I am on well water and have lime, iron and sulpher deposits. What can you do to prevent thi?. We clean it, but it comes back quickly....
 

LLigetfa

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It sounds like managnese and it along with the iron should be treated with an iron filter. Is what you call sulfer from a bacteriological source and have you tried shocking the well and house plumbing?
 
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