[Jack]

I had a bad experience with lava rock. I though it would look like live rock once covered. It would have looked great had it worked for me. Although my lava rock was not from an aquarium store, I just went out and found some and used that. I had algae problems like you wouldn't belive. It was insaine. Now I'm re-doing my tank. Good thing I only ruined a fish only tank with that lava rock. Word of advice, you are probably taking a risk using it, but if it works, great. Just didn't for me. Now that I have restarted, I am going for a reef tank :D . No way in hell I would use lava rock this time.