So I was making a C02 generator for my tank with only plants C02 was being produced, which was great, but i kept getting a consistant eruptions of yeast over flowing and cloging my bubble wand, then the tubing fell off the wand and sprayed yeast into my tank, is it going to harm my plants? also will the yeast never stop its over flow? if not I was planning to start a two purpose set up with a brine shrimp cultivater attached so the spraying yeast will be an auto feeder.

You should buy what is called a check valve for the air tubing between the bottle of yeast/sugar/water and the airstone. This will keep the mixture from backflowing into the tank.

What mixture are you using?