Cat Fish

About six or seven years ago I bought a second hand fish tank from a chap at work. I was going through a stressful time and I hoped that an aquarium would be relaxing. I knew nothing about keeping fish and followed the chap's instructions. Filled the tank with water and stones for a week before introducing fish. We went out and bought 2 cat fish and tetras. Unfortunately the pump did not work probably and we lost the tetras but the catfish survived. We got a new pump ( and a telling off from the fish shop guy) and got guppies. Guppies have lots of children and we haven't had to buy any fish since. Earlier this year one of the cat fish died and this morning when I found that the second cat fish had died. It feels like an end of an era.