How long is it recommended to keep the blow off tube on? I had to use one for the first time because I made a liter starter for a hefe using wyeast 3068. I aerated well and had a huge mess the next day. I put the blow off tube on for a day, and it looked like I would be fine putting an airlock back on the following day. I came home to another mess the third day. I've had the tube on for about two days now. Will the krausen in the tube effect my finished product? Should I leave the tube on or put the airlock back on? How long do you typically leave your tube on?