So I had an incident Sunday and had to fly to the big island (Hawaii) on an emergency mission. While there we stopped at the military training area (PTA - Pohakuloa Training Area) to do some work and I picked up some lava rocks off the impact area. I thought they might work in an aquarium or some sort of project so here's some pictures. You all let me know what you think. They are sharp and fairly light weight. One of them is so aerated that it floats!
That's me wearing a borrowed hoodie and freezing my butt off at around 13,000 feet.
As you can see, we are above the clouds and what you see below the clouds is not rain, it's volcanic fog or VOG.
The locals drive up when it snows to steal the snow and bring it home for various reasons.
Here's two of the rocks after soaking in a bucket of water for a while.
The one higher in the picture is the rock that floats.
And here's another angle.
Good candidates for attaching moss to? Perhaps some rooted plant that doesn't require substrate? How about running and airline into a hole I could drill and see if it shoots bubbles out all the little holes?

That's me wearing a borrowed hoodie and freezing my butt off at around 13,000 feet.

As you can see, we are above the clouds and what you see below the clouds is not rain, it's volcanic fog or VOG.

The locals drive up when it snows to steal the snow and bring it home for various reasons.

Here's two of the rocks after soaking in a bucket of water for a while.

The one higher in the picture is the rock that floats.

And here's another angle.
Good candidates for attaching moss to? Perhaps some rooted plant that doesn't require substrate? How about running and airline into a hole I could drill and see if it shoots bubbles out all the little holes?