Rocks okay?

TrashmanNYC

I found a bunch of nice stackable rocks today when I went to cut down my Christmas tree.........
heres a couple of pics........they seem to have some kind of "silver" material in them........







Do you think they are safe for my aquarium?

Thanks......
Robb

The-Wolf

the rocks the 'sparkle' probably have an ore of some kind in them,
this could be dangerous and should therefore be avoided.

the rest looks like a mix of shale, sandstone and granite but I'd nedd pics of each one to be certain.

you can do a quick test to see if any a calciferous (which also shouldn't be used). poor a small amount of white vinegar on the rock, if it fizzes then it is calciferous.

MattD

I wouldn't just throw in some rocks if I found them. They could leech undesirables into the tank.