Hi all,
I am pretty sure most of you will know what this is.
Wikipedia wrote:
Pumice is a textural term for a volcanic rock that is a solidified frothy lava typically created when super-heated, highly pressurized rock is violently ejected from a volcano. It can be formed when lava and water are mixed. This unusual formation is due to the simultaneous actions of rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the solubility of gases (including water and CO2) dissolved in the lava, causing the gases to rapidly exsolve (like the bubbles of CO2 that appear when a carbonated drink is opened). The simultaneous cooling and depressurization freezes the bubbles in the matrix.
Wikipedia wrote:
Pumice is also used as a growing substrate for growing horticultural crops
Just wondering if anyone has tried using it??
Its normally very light in weight.
Would like to give it a go, although floating would be an issue, perhaps a 50/50 mix with hydroton.
Please give me a heads up if anyone knows where to get this stuff in pieces......hopefully cheap too
John
