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karenb
10-20-2011, 07:39 AM
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
10-20-2011, 07:53 AM
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?