Rocks ID - Is it safe for aquarium - The Planted Tank Forum

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post #1 of 17 (permalink) Old 04-20-2013, 05:16 AM Thread Starter
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Rocks ID - Is it safe for aquarium

Hey guys,

So i am planning on doing a new iwagumi style tank and I found these rocks in my backyard. I love the looks of them and i really want to use them. I think they are for decoration purposes so i am afraid to use them in my planted tank.

Other info
I live in Canada in Calgary. Maybe these rocks are from the Rockies
Concerns
1) Why type of rocks are these? Are they safe? will they influence water parameters?

2) Since I think they are made for garden decoration purpose will they be treated in some way? Is there anything i can do to prepare the rocks for my tank?


thanks
Martin


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post #2 of 17 (permalink) Old 04-20-2013, 04:37 PM Thread Starter
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bump.
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post #3 of 17 (permalink) Old 04-22-2013, 04:22 PM Thread Starter
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anyone?
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post #4 of 17 (permalink) Old 04-22-2013, 04:31 PM
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Sweet rocks! I would said I can't see why not but I'm no expert.

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post #5 of 17 (permalink) Old 04-22-2013, 05:04 PM
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yeah, I'll preface my comments with the boilerplate "I'm not expert" as well, but I'd have no qualms about putting rocks from my backyard into a tank. Obviously, scrub 'em good with a brush in the sink.

I might think twice if the rock was super-porous or something - I might boil them in that case to make sure there's nothing hiding in there. I would have pause if they were man-made, poured concrete or something - who knows what chemicals are in that stuff.

But doesn't look like what you've got there is anything but good 'ole mother nature... I say go for it!
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post #6 of 17 (permalink) Old 04-22-2013, 05:05 PM
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on second thought, that square one looks iffy. better send it to me for closer analysis.
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post #7 of 17 (permalink) Old 04-22-2013, 05:13 PM
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Do a vinegar test. Most igneous rocks are good unless then have metallic inclusions. I found a rock in Maine along a river that is sedimentary with one type of rock wrapped around another and the outside rock (brown) is fine but the interior stuff (blue) bubbles slowly when I use vinegar.
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post #8 of 17 (permalink) Old 04-22-2013, 05:26 PM
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A very basic test I know is to use some vinegar and look for foaming. Foaming is bad. Other then that looks like common shale
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post #9 of 17 (permalink) Old 04-22-2013, 08:17 PM Thread Starter
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Awesome. Thanks for the advice. I will give the vinegar test a try tonight.

Also boiling it sounds like a great idea.

Would a bleach + water soak help with killing anything on or in it?
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post #10 of 17 (permalink) Old 04-22-2013, 10:59 PM
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Bleach would work but you'd need to clean it off real good.

Also, vinegar isn't a very strong acid so I'd try something else if a available. It works Ok, though.

How I feel about non-planted aquariums.
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post #11 of 17 (permalink) Old 04-22-2013, 11:02 PM
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Quote:
Originally Posted by WheeledGoat View Post
on second thought, that square one looks iffy. better send it to me for closer analysis.
+1 I could also take a look at it

I literally love my aquarium(s).

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post #12 of 17 (permalink) Old 04-22-2013, 11:11 PM Thread Starter
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Quote:
Originally Posted by WheeledGoat View Post
on second thought, that square one looks iffy. better send it to me for closer analysis.
HAHA. If you really want it i can send it to you.
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post #13 of 17 (permalink) Old 04-23-2013, 12:10 AM
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As indicated above, it appears to be common sedimentary/shale rock.
There are relatively few rocks you're going to run into that are not safe btw - not saying there are not a handful out there.
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post #14 of 17 (permalink) Old 04-23-2013, 03:16 AM Thread Starter
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As indicated above, it appears to be common sedimentary/shale rock.
There are relatively few rocks you're going to run into that are not safe btw - not saying there are not a handful out there.
Awesome. Thanks for the extra conformation
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post #15 of 17 (permalink) Old 04-25-2013, 12:47 AM
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Bit late here, but haven't logged in for a few days.

I can't tell for certain, but that small one underneath the other rock to the far right, it looks like it's displaying a weathering pattern that's pretty typical of limestones.

Doesn't mean much by itself, a lot of the rocks they use for the Amano style scapes are carbonate.

Also, when you do the acid test, it helps if you scratch a bit of the rock up, and add some acid to the scratched area/powder.
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