I need help with the DIY CO2, i've tried it twice and it seems to be injecting those liquid things instead of CO2. I put 1 tsp of yeast and about 2 cups of sugar and the water up to the bend of the 2 liter bottle. One question, how much is 2 cups of sugar when i see it on sites. I really want to have CO2, can't wait =D i just build my 50 gallon tank and waiting for more CO2