Rock?

[Jewlz]

I'm wanting to check out our local landscape/builders supply yard this weekend to find some rock to use in my Discus tank...

Is their a type of rock I should stay away from? I don't want anything bad leeching into the water or changing the water chemistry.

Thanks!
Julie

[Merrilyn]

Smooth river rock is what you want. Stay away from anything with sharp edges. White rock will bump your pH up so stay away from that too.