The savings over aquasoil isn't THAT great.
It is about .70 cents per liter differenence. Pre shipping.
akadama is 4.20 per liter shipped from amazon(for 15 liters)
Aquasoil is 4.95 per liter shipped from adg (for 9 liters)
or 4.49 per liter shipped for 18 liters from adg.
Not saying that the Akadama isn't great... Because it is basically the same thing... But it isn't a huge savings either, and the ada is more my color preference.