All you ever wanted to ask, and did, about bonsai substrate. From what I use, my thoughts about akadama and how to go about sifting bonsai substrate, re-using bonsai substrate (Effective recycling) and a form of sort of sterilizing bonsai substrate. This video includes it all!
0:00 Bonsai substrate!
0:25 Recycling bonsai substrate
1:30 Function of bonsai substrate
2:15 About akadama
3:30 Bonsai substrate components
6:30 Bonsai mixture ratios
9:40 Concluding
9:55 What is the best bonsai substrate?
Recycling video by Lara Jameson
https://www.pexels.com/video/a-person-separating-recyclable-materials-9323702/
Pagoda video by The Instagrapher
https://www.pexels.com/video/the-kinkaku-ji-temple-in-japan-5852984/
Music by lvymusic from https://pixabay.com/music/corporate-calm-background-for-video-121519/