Goldfish are the most mistreated fish in the hobby — comets, orandas, and bubble eyes need completely different setups. Real tank sizes, filtration, diet, and the myths that kill them.

Goldfish are one of the most mistreated fish in the hobby, and it starts with the bowl. Properly cared for, they can live 25 years or more and grow over a foot long. Here is the basic care that gets them there.