Leca/perlite

Hi Kirk and the List.
 
Leca is first of all used as an airy isolating material in buildings. It is a very light concrete form. It weights nearly nothing, reminds of cinders, and looks like small brown stones. It is also common
used by gardeners in plant propagation to make the soil airy and keep the moist.
I don't know what perlite is! Maybe it is the same product!
 
Kind regards
 
Ove Christensen
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