wrote:
Hello,
I've been getting this discoloration at the bottom of my toilet. It
looks like something is peeling off the bottom, but not sure what it
is? Anyone know? Also, is there a chemical product that i can use to
get rid of this? Pic below. Thanks.

http://i5.photobucket.com/albums/y19...IMG_3890-1.jpg


Hardwater deposits. How often do you use a toilet
cleaning solution? and scrub the dark area shown.

Contrary to others, you probably don't need any
special acid, regular toilet clean products
usually are acidic. What you should try and
probably the quickest and best approach is using a
pumice block ("PUMI" or some such name). Turn
the water supply off, flush the toilet, put on
your rubber gloves and scrub. Probably take 1
minute to remove most of it and will probably
smooth the surface enough to retard future deposits.