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Ok, so this is my fist tank. I definetly have learned a lot! Anyways, I have wondered what would happen if the power goes off? Are the fish surviving off the oxygen produced with the filter turning the water or what? I thought they were supposed to have "bubbles" of some sort, but at the fish store I was told the air stone was more of a decoration even though it does put more oxygen in the water. Then you have those fish you see sitting just in bowls! I guess it has me confused, what exactly do they need as far as this stuff goes?