Our aquariums have to operate in a fairly narrow window of water conditions, so it is crucial to keep all of them in check with regular maintenance and testing. Unfortunately, there are many things that happen to our tanks that are out of our control. Things break, equipment shuts down, and in those situations we have to adapt or things start to go south in a hurry. Because of this, it is very important to have backup equipment. Aquarists should have an emergency kit that has replacement bulbs, pumps, and whatever else might fail. Now, these items don’t have to be direct replacements, at least in terms of brand name or identical products. They can be much cheaper, temporary stand-ins that will help your tank stay running while the original item is being repaired or replaced.