lace rock inert?

[rodinia]

I am wondering if anyone knows for certain if lace rock is inert.

Thanks

 

[RoseFishWatcher]

I'm pretty sure it is. I have used it in one of my tanks, and it tests no different from my other tanks with no lace rock.

 

[legendaryfrog]

pardon for hijacking this thread, but where can you find lace rock?

 

[rodinia]

I got mine at my local pet store. 1.99 per lb.