DSC02312 Soil grit mix 3.JPG
I read a lot about Japanese Akadama soil mix, sorry about the spelling. I believe you can get it in Australia but it is very expensive. Would this mix do as a substitute? It's 100% Australia clay. It is kitty litter. But I soaked it over night in water, and although the outside of the particles dissolved to color the water reddish, it left small grit in its wake. I usually throw in a handful into a mix. Advice welcolmed. 

