The inch rule is a bit outdated and misleading imo
. There are just too many variables to be able to put set limits on tank sizes when it comes to fish. Adult size, eating habits and styles, territorial needs, compatability needs, etc. the best we can do as responsible hobbyists is formulate a "rough draft" stock list, gain as much input as needed on it, then adjust accordingly. The same can be done while adding fish. Also just because someone states that they can do something or were able to do something, does not necessarily mean you will have the same outcome. This also works the other way around. For instance, i have a 125 fowlr
with 6 fish in it, its been up for over a month, with no skimmer running, and the trates are at 10-20, most people will tell me thats not possible, but for some reason thats how the tanks running.