Hi
so where i leave there are no Akadama/ Lava / Pumice
so i need to find a substance for them,
my solution is:
organic soil, 20%
perlite, 30%
vermiculite 30%
and something new to me is hydroton clay balls 20% see video -
do you know this materials and if it will be cool to use it in bonsai mix ?

thank you

These pebbles are too coarse. You need to find something smaller. I am using a material that is used under floors as a filler. Some people use cat litter clay

thank you, I think I will crush it to smaller parts... and see if it works,
about cat litter - i have a cat @ home and I did not managed to find a clay litter.... ( regardless to bonsai )

Hydroton is the same as LECA – light expanded clay aggregate.
You can find it in small sizes, like 4mm to 6mm, and it is commonly used as one of the components in bonsai soil mixes.
People here say "don't crush it", so I guess it is better to buy in the adequate sizes.
As for the DE - Cat litter, I've been using it with success.
ATTENTION: There are a VERY FEW brands that are possible to be used (the non-clumping ones). See here:
www.bonsai4me.com/Basics/Basicscatlitter.htm

thanks !
well I tried to fined the smallest LECA/ Hydroton and did not fined something small,
I wonder what can happen if I will crush it ?
I will look for this litter as you advised.

thank you.

Well, I can find it here in many sizes; the two last ones are useful for bonsai mixes.