Lava Rock, Safe?

[ginceng102]

are lava rocks safe for our tanks?

 

[K-Holed]

<a href="http/www.fishforums.net/index.php?showtopic=285534" target="_blank">http/www.fishforums.net/index.php?showtopic=285534</a>

<a href="http/www.fishforums.net/index.php?showtopic=231687" target="_blank">http/www.fishforums.net/index.php?showtopic=231687</a>