Just got home and the power is out. There's been a major storm and it has knocked out power in a wide area, so I don't know when it will be back up. I don't know how long the filter has not been running but I am really worried. I have been scooping up water and pouring it back in the tank, but I don't know if this is helpful to them or not and how frequently I need to do this in order to keep their tank properly oxygenated. Should I attempt a water change to help with the oxygen? Are there other issues I'm not considering? Please help!