Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
The original poster is in Malaysia. Each person has their own opinion of what is the right thing to use; the thing to remember is that vermiculite or Perlite may not be available for gardeners in Malaysia so he needs alternative choices.
Edited because I can't spell.
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"