08-22-2008, 05:01 PM
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I think this is something everyone should plan for. One *important* consideration is that the warmer the water gets, the less dissolved oxygen. So you will start loosing fish if the temperatures get high and there's no water movement.
One option (not entirely perfect but this is good if you don't have time to plan ahead) is to set up a drip system with chilled water. Place the bucket higher than your tank and use some airline tubing to start a siphon going (keep the end of the tubing above the surface of the tank water). You can tie a loose knot in the tubing to slow the drips down if needed. This will keep your water a bit cooler, and create some surface agitation. Just make sure you don't add the water too quickly and over cool your tank, and make sure you don't allow the tank to overflow!
A better option (and what I use on all my tanks) is to get a battery operated air pump plugged into an airstone. I have one that turns on automatically when the power goes out. True, the bubbles don't add much oxygen to the water, but the surface agitation it creates is key. I use the Silent Air B11. There's nothing silent about it, but it does create air and so far had been reliable. Just make sure you've got extra batteries on hand.