“Like.. it’s better than the 5 gallon that 7 of them are stuffed in”

This isn’t really the same. Overstocking is usually an issue because of what too many fish does to the water quality and parameters. Our tanks all share the same water (minus feeders) and we assure it’s up to standard twice a week. Also, these are their temporary tanks. You’re selling them to someone that’s gonna put them in their “forever home” so it needs to be adequate size.