Is this Stone Safe? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 02-08-2008, 12:11 AM Thread Starter
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Is this Stone Safe?

I'm putting together my first big tank. It's a 120 gallons and will have both driftwood and stone. A large piece of driftwood will be on the left as you face the tank and three stones on the right. I hope to have a channel of decorative sand running between the two elements of hard scape.

I found some really nice stone at the local landscape supply company. It's called Three River Rock. The quarry's web site describes it as follows:

"This argillite stone was formed in the Sawtooth Mountains in Idaho. The swirl pattern and tiger stripes of golds, tans, beiges, white & plums are unlike any other stone."

Any Geologists in the group? Does argillite pose any heavy metal leaching risks?"
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post #2 of 13 (permalink) Old 02-08-2008, 12:28 AM
 
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Pour vinegar on it. If it does not bubble it should be safe.
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post #3 of 13 (permalink) Old 02-08-2008, 12:51 AM
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I have something similar in my tank. I'm not sure if its the same stone, but it looks very similar to me as I have the gold/tan stripes. I did the acid test and no problems. I soaked it in a bucket and noticed that it does increase KH/GH and PH a bit, but nothing too bad. I use it in my tank and my shrimp and fish are happy.
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post #4 of 13 (permalink) Old 02-08-2008, 12:52 AM
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argilite is a shale it should not pose any problems just put some vinigar on it like its stated above this will alow you to se if it has a calarous cement. if it fizes dont use it
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post #5 of 13 (permalink) Old 02-08-2008, 01:17 AM
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Who would have thought there'd actually be a geologist on here. This forum amazes me everyday.
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post #6 of 13 (permalink) Old 02-08-2008, 03:17 AM Thread Starter
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Quote:
Originally Posted by metageologist View Post
argilite is a shale it should not pose any problems just put some vinigar on it like its stated above this will alow you to se if it has a calarous cement. if it fizes dont use it
Planning the fizz test this weekend. Assuming it passes, and I expect it will, I will soak it for a while and check the water parameters to see if there are any noticeable changes. It is pretty rock :-)
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post #7 of 13 (permalink) Old 02-08-2008, 03:21 AM
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Sure does look interesting. How large is it?
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post #8 of 13 (permalink) Old 02-08-2008, 05:14 AM Thread Starter
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I poured some white vinegar on the rocks and other than looking even better nothing happened.

The three stones weigh 76 lbs. The largest stone is approximately 13" across x 9.5" high x 7.5" deep.
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post #9 of 13 (permalink) Old 02-08-2008, 05:26 AM
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Looks like you got yourself some aquarium-safe rocks!
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post #10 of 13 (permalink) Old 02-08-2008, 05:45 AM
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Quote:
I poured some white vinegar on the rocks and other than looking even better nothing happened.

The three stones weigh 76 lbs. The largest stone is approximately 13" across x 9.5" high x 7.5" deep.
SWEET!....
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post #11 of 13 (permalink) Old 02-08-2008, 06:28 PM
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Who would have thought there'd actually be a geologist on here. This forum amazes me everyday.

all ways happy to help where i can
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post #12 of 13 (permalink) Old 02-08-2008, 08:56 PM
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@metageologist:

Is it possible some rocks have heavy metal content contained inside the rock itself that won't leach until it's saturated?


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post #13 of 13 (permalink) Old 02-12-2008, 01:29 AM
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yes it is possible some sand stones contain iron and some will contain other heavy metals depending on there proximity to the source rock that was weathered and its original composition of said host rock. but for the most part sedimentary rocks are safe for aquariums in the context of heavy metals. except for black shales that formed in anoxic environments because these normally contain pyrite and other nasty metals.
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