We have kept fish for the last 30 years with my wife a serious breeder with uncountable tanks.
I prefer Discus but the water changes are too high maintenance for the good lady to maintain so I have a solitary shark to annoy my wife's fish in our display tank which is the best screen saver ever built.
I am apparently the long suffering cheque book that finances this obsession, I mean hobby, but I have to concede it is probably worth the investment.
A happy wife means a happy life! :digH: