Shiloh,

Just use that yeast mixture you made. Put it in an open bottle and have a fan above it blowing on your plants. IT MAKES A HUGE DIFFERENCE! The thing is, i think you can only use it during light periods. Im not sure if its light or dark, but i know you cant always have it going. And dont worry it wont hurt you or your animals is nothing close to enough. Im not sure about what turtle was saying about 1500PPM killing you, he could be right, but i know that your little mixture wont produce that much CO2 anyways.

-SS