rockm

I find that recipe to be a bit outdated. There are more ingredient alternatives now that perform much better.

Do not use peat. People avoid peat nowadays. It can be a pain, as it stays too wet and once it dries out, can be impossible to re-wet. It also makes soil pretty mushy.

Skip the leaf mold too. SKip the aquarium gravel, shoot for something more angular

Composted pine bark works better. Fir bark works too. There are some other organic ingredients that work better than peat too.

The granite and pumice are redundant. Pumice alone is good, as is crushed granite. Using them together is unecessary.

It's not necessary to order and pay for freight for soil ingredients...
All of the ingredients are available locally and your local bonsai club probably already has good sources for pumice, bark and other stuff.