i just bought one and my air pump also went out, could i get away with not having air to my 15 gallon for the night. also can you guys give me the pros/cons to this system? it started making bubbles about 3 hours after mixture. i tried a diy system and couldnt get any bubbles (seal probably was not good enough), i was using bread yeast and 2.5 cups of sugar and 1 teaspoon of baking soda. what was my problem? (wrong yeast????) please help.