Amen!! I got crucified for keeping 3 Discus in a 4 foot tank.
They're eating and swimming about just fine. But I'm being 'cruel' by keeping them in a small tank. So is everyone else here!! If they cared so much they'd release all their fish in their natural habitat! Having 4 panes of glass surrounding you is 'inhumane', no matter how big it is.
Some people here are so hypocritical it's frightening.
I'm doing daily water changes in my tanks, I spend hours a week maintaining them. It's your tank, do what you feel is best and enjoy them
Part of domesticating any animal, a cat, dog, reptile, fish, or mammal, is that you are protecting them from the outside world, giving them food, nutrients, livable environment, at what cost? Space. They aren't going to be able to roam an open river or lake, or explore forests and whatever suits their fancy, but they will (or sxould) be given whatever they need to
thrive. In most cases, survive longer than they would in the wild.
What determines minimum tank size, to me, is their ability to live in the tank. if they can live in the tank, reach their maximum size, live their maximum lifespan, and not get deformed, or get picked on by other residents, or not getting their proper nutrients, then youre not taking care of the pet correctly.
Were not spewing nonsense at you out of inhumane ordeals all the time. Sure it can be a little ridiculous sometimes. Like the minimum tank size for a danio being 4 feet (which, dont kill me, but I think is bullcrap, because as said before, you are taking away space in domesticating an animal, and danios can live -past- their average lifespan in a 2 foot tank.)
Regardless, a lot of these minimum tank sizes, and max/minimum numbers, and all of these are here for a reason. In most casts, a group of 3 discus wouldnt work. Why? because there arent enough discus to disperse the aggression among the group.
The sharks should be kept in groups of 6 in extremely large tanks because of why? their skittish, big, fast fish that may injure themselves in small tanks if startled.
Yellow labs sxould be kept in big groups with otxer Malawi cichlids why? to Disperse aggression, and because they like a higher ph than other fish.
Ultimately, you are caring for an animal properly if you give it proper food, keep it from getting sick, keep it from getting picked on or killed by tank mates, and make it at least somewhat physically comfortable. Because you're right, we cant give our pets all the space in the world.
If you refuse to follow these because you like the look of a fish, and wont give it better environment for its needs when your environment is unacceptable, then you arent properly keepinx a fish. your fish is going to get picked on, it'll be uncomfortable in its water, or it wont be able to reach its full size or lifespan, and it may be more prone to diseases. And that means that you are not managing to take proper care of it.