Is there any problems with putting a rock in the tank? Like a rock from
outside (stone) I guess it would depend on what kind of rock and I don't
know how to explain, but its just a gray rock/stone, I guess like the kind
you would find in your yard? I just wanted to put it in to hold something
down.
Nik

Also I have seen plant pots (the orange ones) ceramic I guess they are, in
tanks before I have one and was going to use it so I put it in water over
night to clean it and noticed the next morning some of the water was orange,
so I did not put it in the tank, is there special ones like made for tanks,
or is that normal for color to come off?