
A few weeks ago, I bought a small fish tank for my daughter together with five red-coloured tropical fish, as chosen by her from the shop. We were all excited with the newfound activities of feeding the fish, replacing the water and cleaning the mini-aquarium. One fine day, my wife noticed one of the fish was floating motionless in the mini aquarium. Dead. Hmm, we guessed that the fish must have found it too great a challenge to adapt to the new...