A package of baker's yeast is at least twice as much as You need. The more yeast you add--the faster the yeast will consume the sugars and die off. as they die off, production slows and then ends.
Too much yeast and not enough sugar.
I used 2 1gal apple juice jugs and the jello method on my 55gal and it worked great!
My initial setup proportions for the 1gal jug are as follows:
2- 6oz. Cherry Jello Brand gelatin—Follow instructions and add 2 cups of sugar
Next day add:
2 Cups Warm water + 2 cups sugar
2 cups Refrigerated Mott’s Apple Juice-Nuked 1 min. (or just 2 more cups of warm water)
1 Tsp. Red Star Active Dry yeast-Mix in jug
Small Pinch of Yeast left Floating on top
After the mixture slows down: pour out the liquid (leaving the jello that is left over) and refill with warm water, sugar and another tsp of yeast.
Then do the same for the 2nd refill.
I add about 1 cup of sugar per cup of water on the refills.
By the end of the 2nd refill--this should last 6+ weeks, so if You do 2 1gal jugs 3 weeks a part--you should be good to go....