I just built me the DIY CO2 reactor, using the basic method 1/2 full 2-liter bottle of warm water, 2 cups of sugar, 1 spoon of yeast, and waited about an hour and half the put it to the test. It took about 5 mins. for it to start making bubbles but it is now an hour later its making alot of small bubbles...is this normal? Did I do something wrong?:help: