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Re: What Can Grow on Lava Rock
Posted: Thu Aug 31, 2017 3:05 am
by KategoricalKarnivore
Hey Bob do you have any experience with Texas holey rock like this. I have a few chunks I would love to grow pings on.
Re: What Can Grow on Lava Rock
Posted: Thu Aug 31, 2017 3:08 am
by Raistlarn
Isn't that the kind of rock that you can find next to the ocean on some places? If so I'd probably avoid it, because of salt accumulation.
Re: What Can Grow on Lava Rock
Posted: Thu Aug 31, 2017 3:15 am
by KategoricalKarnivore
Raistlarn wrote:Isn't that the kind of rock that you can find next to the ocean on some places? If so I'd probably avoid it, because of salt accumulation.
No its limestone that has been underground for thousands or maybe millions of years. It's left over remnants from the ocean that used to cover the middle of the US. The holes are from water slowly dissolving the rock away over thousands of years. There are a few areas in the middle of Texas where this rock is now exposed on the surface. It is used in freshwater aquariums all the time. No left over salts in it.
Re: What Can Grow on Lava Rock
Posted: Thu Aug 31, 2017 3:22 am
by Raistlarn
Hmm. I just had to ask, because on the west coast we have limestone like that near the ocean, but it's holey from the ocean chewing it up.
Re: What Can Grow on Lava Rock
Posted: Thu Aug 31, 2017 3:47 am
by KategoricalKarnivore
Ah cool. Thanks for the response. Ever heard of people using it for pings?
Re: What Can Grow on Lava Rock
Posted: Wed Sep 06, 2017 5:51 am
by Raistlarn
Has anyone tried Feather Rock? Here is the description from a landscape site: Feather Rock is charcoal and silver grey in color with a sharp, course texture and irregular shape. They are products of a rare volcanic occurrence, formed by a molten lava flow which trapped air that later escaped during the cooling stage.
Re: What Can Grow on Lava Rock
Posted: Wed Sep 06, 2017 4:50 pm
by Bob Beer
I'm trying it now. Evidently there are a couple of different things that get called feather rock.
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Re: What Can Grow on Lava Rock
Posted: Wed Sep 06, 2017 4:54 pm
by Raistlarn
For some odd reason I'm not too surprised. Lol
Re: What Can Grow on Lava Rock
Posted: Sun Sep 10, 2017 3:05 pm
by Raistlarn
I just went to the landscape store that sells feather rock, and it is pumice. I also learned one thing from this venture other than feather rock is pumice, and that is wear gloves when handling pumice. Pumice is pretty sharp.
Re: What Can Grow on Lava Rock
Posted: Mon Sep 11, 2017 7:22 am
by Bob Beer
Oops my bad, the other one I'm trying is lace rock. It's a lot heavier than pumice and actually refers to a couple of different things. It doesn't wick quite as effectively as pumice but it holds water quite well. I think a growth of moss on it would help the water wick farther up.
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