I have a similar issue. Within the first 15 hours, I saw good bubbling in the air lock. Only a day or so later, no bubbling at all. Bad yeast maybe? The temperature is right around 68.
I just bought a True Brew starter kit. As I read through the booklet included, the directions call for boiling only one gallon and pouring it into three gallons of cold water. But I see in other places that I should get a 36 quart SS pot and a chiller etc. What gives?