Originally Posted by SaraGarcia1701
And as a side note the vases are more than a gallon of water and the water doesn't have to be heated for Bettas. In the wild Betta fish live in murky puddles that have a slight amount of water and they basically go from puddle to puddle searching for a mate.
Betta aggression appears when a fish has brighter colors than the other, so forgive me if I tried it out with my white Betta who lacked color with my gold Betta. The white one was completely uncaring in case you were wondering.
Your fish are not living in the wild. They are a domesticated breed and are not supposed to be in "survival mode" as a pet. People use the "this is how they are in the wild" excuse so they don't have to actually research what is best for the fish that they have in their possession.
As a side note, I have noticed that just because someone works at a pet store does not necessarily mean they have correct information in regard to proper fish care