Lava Rock...is this the good stuff?

[zennzzo]

I know there is a type of Lava Rock sold that is actually "slag" from Steel production, that is no good for aquaria.

I have a couple of these pieces I'd like to chisel out to make some caves...

They been sitting outside for over a year in the weather, and have not changed color at all...

Is this the good stuff or the bad stuff? Anybody know?

 

[zennzzo]

ttt

 

[sterling_mcdaniel]

it doesn't look like lava rock it looks more like pumice (which may float)
It is still volcanic rock but lave rock looks more black to dark gray.

 

[Aquariumjunkie]

yeah, it doesn't look like lava rock. all my lava rock is redish in color...

 

[zennzzo]

it doesn't look like lava rock it looks more like pumice (which may float)
It is still volcanic rock but lave rock looks more black to dark gray.

Pumice:[puhm-is]
[SIZE=-1]Light-colored, frothy volcanic rock, usually of dacite or rhyolite composition, formed by the expansion of gas in erupting lava. ...

Question is:
Is this safe for aquaria?....

Rhyolite:[/SIZE][SIZE=-1]Volcanic rock (or lava) that characteristically is light in color, contains 69 percent silica or more, and is rich in potassium and sodium.[/SIZE]

 

[Nic]

can you get it out of the sunlight??? an snap some more pix?

 

[zennzzo]

can you get it out of the sunlight??? an snap some more pix?

sure 1 sec...

 

[sploke]

The only kind I've used is the stuff they sell for gas grills, red chunks.

 

[Yanbbrox]

Looks porous to me

 

[IITUFFTOBEATII]

Where did you get it from, has it always just been sitting in your yard?