[header] How to repair a leaky aquarium [title] Drain some water from the aquarium. [step] Drain the water low enough to allow room to clean and dry the area around the leak. You can use a cup, bucket, or other container to remove the water. 
If the leak is at the bottom of the aquarium, you will need to remove all water and aquarium rocks from the tank. [substeps] If the leak is very low in the tank, you may have to move the fish and aquatic plants into a temporary container or other aquarium while repairs are made.