Actually, it kind of does look like that, except mine are small flat
squares on a shower stall floor and they look a lot safer! ;-)
I guess I must have manganese in my water. Do you know if it's a corrosive
agent? I'm wondering why the luster on the affected tiles has disappeared
I doubt the folks at Yosemite would be interested in my bathroom as a
tourist destination. What a great photograph.
I don't know anything about manganese staining. It's really just a metal
that is common in most living things and in water so its a pretty common
culprit in staining of metals, porcelain, and tiles - espcially in areas
with lots of minerals in the water - well water would be a source for sure.
As to whether or not this is the source of your problem - I don't know. All
I wanted to was give you a possible lead for you to research - and since
it's pretty common there has got to be lots of people who have solved it.
I've never had to deal with it, but I would imagine you would remove
manganese the same way you would remove other metallic stains.
It's not a corrosive, so it wouldn't have damaged the finish on your tiles,
although perhaps in forming the oxide the manganese robbed the tiles of
something and pitted them - making it look dull and dingy.
Again, I'm no expert on the subject, I was just making a suggestion as a
place to start looking. I hope it helped.
Yes, but it's certainly worth a call to the county. I remember they ran
through a number of things when they were telling me what they found in
my well water, but since they said it was safe, I didn't pay much
attention. There must be something there.
That's what I was hoping to find here, and you've given me a great place
to start, for which I'm grateful.
That's exactly how they look, and perhaps there's some other mineral in
the well water that IS corrosive -- so I'll get the whole report while
I'm at it. Thanks again. You've been a terrific help.
Throughout this thread, you keep mentioning that the staining is where you
used a soap product. Keep in mind that soap while being alkaline it is a fat
product made from animal or vegetable fats or oils -- grease. This grease
will soak into the pores of limestone and discolour it. Try rubbing some
cooking fat on a hidden area and see the change. Old, rancid grease will
darken, trap dirt and change the look of the area. I think you should try,
again in a hidden area, a strong detergent cleanser, cover it with a plastic
sheet to prevent it from drying out for a few hours, then rinse and scrub
toughly a few times and see if it will remove the stain. I have seen similar
stains on "cultured marble" shower pans, it takes a lot of work to remove
and then it promptly comes back when it is used because the surface is
The alkaline nature of soap is what led me to believe that was the cause to
start with, though I'm intrigued by the discussion of minerals in my well
water. I've got some scraps, though, so I can try this on one of those as
well to see if I can duplicate the condition.
If I'm able to get any of the staining out, will repeated applications of
sealer keep it from re-occurring?
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