Lava Rock In SW Tank

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Relofish

Aquarium Advice Apprentice
Joined
Nov 10, 2008
Messages
21
I was reading that I could use Lava Rock from my old FW setup in my new SW tank; And that critters and algae would grow just as easily as it would on Live Rock. Are there any key advantages or disadvantages of using Lava Rock in a SW tank. I have a 30Gallon tank with about 24 pounds of Live Rock already. Just trying to save a few bucks and fill up the tank.
 
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