I've started my first batch. I am exactly 6 days in today. I am fermenting 4 gallons in a 5 gallon carboy. The seal is completely airtight with the exception of the airlock. The airlock has not been damaged at all, there is no possible way for CO2 to escape other than through the water in the airlock. Bubbling was very rapid the first 3 days but now has stopped completely. The foam that was resting on top once appearing about 2 1/2 inches in height is completely gone. Bottom line I'm worried my fermentation has stopped. I do not have a hydrometer and I will be straight forward with you, I don't have any money to buy one. I should probably also add that I used bread yeast, I know its not recommended but this first batch for me is really just an experiment to see if i can make alcohol before I decide to take this seriously. The temperature in the house is usually between 55 and 65 degrees. Is the temperature too cold? Is there any "home remedy" so to speak, that I can use to be sure fermentation is still occurring? Is 6 days OK for fermentation to have stopped?