The Day the Tank Went Empty

The story is told in the narrative of the tank in the form of personification. 

The author allows a child to learn first, the responsibility of taking care of their pet fish and the tank the fish lives in. Followed by the emotions of the character losing his pet fish and the feelings related to the loss. Finally, the change to learn that we have great memories, however we can still embrace a new pet fish with love and care.