I used the sugar, which is mixed water and added the
soda in the box, after one day, there were bubbles appear
from the air stone, So it worked in my first time to do it.
My plant maybe be grow more healthy than before, after
that, I will try to produce the fertilizer for water plants.
from http://my6671.pixnet.net/blog/post/30259963-%E8%
87%AA%E8%A3%BD--co2--%E4%B8%8D%E6%B1%82
%E4%BA%BA%3C%3C-%E5%AE%8C%E6%95%B4%
E7%89%88%3E%3E
