We use yeast in our tank too. It is WAY cheaper than a box of that chemical stuff. I can't think of the name for the life of me.:|
Because you're actually "guestimating". It's ABOUT 2. Usually, when it calls for 2 pkg. yeast, I usually measure 2 1/4. It's like if you want to make Kool Aid, and it calls for 1 cup of sugar. You can put in 3/4 cup and get away with it. Just not quite as sweet (which some may think is a good thing!) Or you can cut the salt in half most of the time without anyone being the wiser.