We used to have fish. Last one died last year after about 10 years or so. One fish which we had died at about 15 years of age, which at the time, was older than me!

I can tell you that you will need to feed them every day. We used to put some pellets and flakes in. The tank will also need cleaning regulaly. Also, I wouldn;t have too many fish, as you wouldn't want it to be crowded.