Are there any facts that go against people's common sense?

I always think that the bigger the fish tank, the better the fish grow. However, my idea is against common sense.

Especially in the larval stage of arowana, fish in small fish tanks are most prone to nervous mood. The solution is to divide a small space with a partition every time, and a large part of the large water body is wasted.

Changing water, cleaning and filtering are big problems, and changing water is also big, which is unimaginable. Considering such a large amount of water exchange, the interception of water, water exchange time and cleaning and filtering time are particularly long, which wastes time.