Ok well ive set up a 10 gallon planted tank, and i am using a DIY yeast mixture. A few days after i set it up, there was this white whispy growth at the end of the tube where the co2 goes up the ladder. I was stupid and had the line going directly fron the bottle into the tank. So i took it out, cleaned it up and put a break with the tube going into a soda bottle and another going out into the tank. But now the groth keeps coming back, what is it and how do i get rid of it? Im using normal yeast you get in the 3 packs down the baking aisle. Its only where the Co2 goes into the tank.