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Old 01-29-2009, 04:22 PM   #31
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Originally Posted by RedIrocZ-28 View Post
Muriatic acid is what is used in the fish tanking trade to get rid of hard water deposits. Wear gloves. And Rinse! rinse! rinse! when you are done.
+1 definitely looks like mineral deposits. Use muriatic acid; you can find it at most hardware stores. Or looks for something called Aqua Regia (it's HCl and HNO3 together)
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Old 01-29-2009, 04:44 PM   #32
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Guess I missed the pics.

Does look like mineral deposits, and I've always had good luck using white vinegar on those. Of course, it helps to be able to wipe after soaking. Have you tried sticking a wash-cloth to a wooden dowel to get a bit of friction in there?

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Old 01-29-2009, 06:06 PM   #33
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the Star San is getting cloudy likely because of minerals in your tap water
Nope, I used distilled water. That's why I got onto the mineral deposit kick.

The CLR doesn't seem to be doing much. Muriatic acid is up next!

I can get my carboy brush in there, and I've scrubbed furiously at just one patch for probably a total of 20 minutes. Nothing budges.

After the muriatic, I'm calling it clean enough. Whatever that guy brewed in here, I want the recipe! I've dropped maybe $20 into cleaning it. I had the star san and oxiclean anyway, so I've only bought $3 for drano, $7 for PBW and now $8 for CLR. In my parts, I can't even find 7g carboys, and the 6.5 ones are almost $50. I'll probably dry vinegar and ammonia (separately) at some point, those are cheap enough. What I've done to test is put about 1 gallon of fluid in, and laid the carboy down so it soaks one strip of the carboy from top to bottom. That way I have a solid line to check to see if anything has changed, so I'm not using much of any one chemical. Once I find the magic one, I'll fill up the carboy.
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Old 01-30-2009, 04:46 AM   #34
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Where is Billy Mays when we need him?!?

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Old 01-30-2009, 01:33 PM   #35
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Where is Billy Mays when we need him?!?
I bet he could talk/yell at it and the stains would come off!
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Old 01-30-2009, 01:55 PM   #36
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The "stains" look very similar to a time I etched my windshield's glass with a hydrofluoric acid solution I was testing.
If I were to guess, I'd say you have yourself a tiger striped carboy.

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Old 01-31-2009, 01:13 AM   #37
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Vinegar and ammonia didn't work. Muriatic acid is sold by the gallon for $25, and that would put me at the cost of a new carboy.

I give up. As an Irish Taurus, that's really, really hard for me to say.

I'm actually considering taking my Dremel, which has the long flexible shaft attachment, and seeing if I can't attach it to my carboy brush. With a polishing bit it should be OK, enough for me to tell if it's etched on or not...

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Old 01-31-2009, 03:55 AM   #38
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$25 for muriatic acid? Where are you shopping, SkyMall?

Go to a pool supply place and pick up a gallon for $3. I guarantee you it will eat that $hit right off in 5 minutes. Just dump some of it in and swirl it around. Be careful, because it will also eat anything that isn't made of metal, glass or plastic in about the same amount of time, including your flesh and clothing. Also, don't breathe the fumes.. it's probably mustard gas or something.

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Old 01-31-2009, 01:54 PM   #39
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Is this a PVC (plastic) envelpoed Pyrex carboy by any chance? I have some that look just like that, but it's on the outside. They're used in the medical field in case the glass cracks, it's contained. Just a thought.

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Old 01-31-2009, 01:54 PM   #40
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Quote:
Originally Posted by Hugh_Jass View Post
The "stains" look very similar to a time I etched my windshield's glass with a hydrofluoric acid solution I was testing.
If I were to guess, I'd say you have yourself a tiger striped carboy.
That reminded me of that Comcast Digital Voice commercial

"Sorry Roger, you tiger carboy now"
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