Mbuna Posted June 10, 2007 Share Posted June 10, 2007 Hi all, i got some rocks from a friends garden today that have a bit of a metallic tinge to some of the edges and was wandering if it would be ok to use in a tank. They were originally from the beach and have some pretty impressive holes and crevices in them. cheers Harry Link to comment Share on other sites More sharing options...
missy Posted June 10, 2007 Share Posted June 10, 2007 As far as I'm concerned rocks with a metallic tinge to them are bad for fish so shouldn't be used. Bad in what way? Well I forget what the reason is so maybe someone else could fill you in on that HTH Link to comment Share on other sites More sharing options...
luket Posted June 10, 2007 Share Posted June 10, 2007 Define metallic? Taken from another site - Metallic-looking minerals like pyrite (fool's gold) or galena need to be avoided. Metallic-looking minerals are usually sulfides, but can also be arsenides, selenides or antimonides. They can oxidize under water, releasing acids, potentially toxic metals and other solutes. In fact, mined rocks in general may cause problems because they can contain small amounts of soluble or reactive minerals that are removed from rocks -- like stream-rolled stones -- that have been exposed at the surface. Link to comment Share on other sites More sharing options...
milhouse Posted June 10, 2007 Share Posted June 10, 2007 Ahhh, thanks for the tip Luket, I just went straight to my cichlid tank and removed the large rock covered in pyrite!!! I thought it looked cool with the fools gold shining under the lights, didnt realise it was toxic. Cheers, Milhouse. Link to comment Share on other sites More sharing options...
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