Thanks. The shower is not huge: 36" x 60" footprint. I just finished the remodel this spring and, as you can tell from my other post, owe a debt of gratitude to these forums. I didn't do the tile myself but was very skeptical about my grout lines because of the bevel on my marble tile. My contractor (and Bill V without knowing it) reassured me. Although I thought they were too wide at first, I've grown to like them and the contrast caused by the gray grout. A lot of people use straight edge tile, and they really should know how the bevel affects the grout lines. But, like I said, I've grown to like it, and it saved me 40% on the tile costs (I was actually able to get my honed calacatta gold for less than $13 a square foot, which is a steal).

Thanks for your messages. When I read Home Forum, "Cleaning Tips" a thread on mildew in caulk no travetine was involved. It seems that peroxide or tea tree oil will kill mildew spores, but clorine bleach is needed to remove the stain. I was concerned these materials might damage the travertine, however seeing that buddysmom has used Oxyclean & other places on the web has also, I'll try that. It appears that Clorine bleach is Alkaline with a PH of 12 to 14 (Vinegar = 1) that I/we might be ok to remove the stain with a dilution of clorine bleach & water. My stain is primarily on the grout (with some in those small pores -- my contractor actually scraped the grout across the travertine to attempt to fill many of those & allow it to still look natural -- of course that grout possibly washed away 1st :-(). It sounds like alkaline on travertine is ok, but I'll dilute & not leave on too long. Thanks live_wire_oak. I will probably make a different decision next time on travertine in the shower, but I had such good intentions & it is so very attractive . . . I'll let you know how it goes.

We saved a ton of money buying this from Home Depot for a really low price. It's where there are holes and blemishes in the tiles and they fill it with something similar to grout. They look pretty cheap and there are some blemishes they don't fill. I'm not happy with the bathroom we just remodeled in an investment property, which we live in right now! My husband is a contractor and would not use these again.

Is there a grout "haze" over all the tiles or is the grout just filling the pits? They should be able to clean up the haze with an acid wash. If it is the only the filled pits and holes you are seeing, then I don't think there is a way to easily remove the grout after it has set. Good luck.