The great zebrafish massacre

I should never have agreed to buy Sasha fish for her tenth birthday. But it seemed like such a modest request. It’s not like you’re going to come home one day to find they’ve escaped or starved to death — like certain rodents I can think of. I was also lulled into a false sense of security by Sasha’s promise that she would look after them herself. I wouldn’t have to lift a finger.

It wasn’t until we were in the pet shop that I discovered she had something more exotic in mind than a couple of goldfish. She wanted tropical fish. That meant spending £100 on a 50-litre tank, complete with built-in filter and heating element. We were then told by the pet-shop owner that he wouldn’t be able to sell us any fish until we could prove that the nitrate levels in our tank had fallen below a certain level.