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bluoval1
09-08-2003, 02:04 PM
I picked up some rock while Iwas out hiking in a park. The rocks are rust colored and break apart in layers pretty easy. I am thinking they are rust colored maybe because of their iron content? How can I tell if a) that is why they are colored like they are and b) will they be safe in the tank (ie leech out iron into the tank)?

SGypsyMermaid
09-08-2003, 02:09 PM
i would assume that it is iron and not use it.