Are these rocks safe? - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 06-05-2013, 11:08 PM Thread Starter
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Are these rocks safe?

I've been looking for rocks in my area to add to my aquarium. I got a bunch and soaked/cleaned them. They all passed the vinegar test, but I don't really know what kind of rocks they are and if they will be safe for the aquarium. If anyone can ID these or give me some idea that'd be great.

In the large picture I numbered them for reference, and I included some close ups of the ones I was most unsure about.
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post #2 of 2 (permalink) Old 06-07-2013, 01:19 PM
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The one with the orange stain I would stay away from. You want to keep anything metallic that may rust out. The slate is fine
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