Pink stuff build-up on shower floor

replying to gyiddip, M.Boo wrote: I've wondering what the pink stuff is as well. I've got two bathrooms in my home. One has a shower/tub, that is my bathroom. My boyfriend prefers the shower stall in the other. I knew it couldn't be the water because my bath hasn't any pink problem and his does. And that's what led me, quite perfectly, to this thread. The construction explained it all for me! He's an HVAC man. Been working it for almost 40 years. We had the same problem in our previous home, only had one bath there, and I'd wandered then as well. So, thank you so very much for solving my mystery. Now all I need to do is convince him that a shower in his shop would be so nice for him, lol!!!
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