When you receive your fish, they may be stressed and not as colorful due to the stress of their journey. They will arrive in either a breather bag or in a standard fish bag.
Breather bags allow gas exchange through the walls of the bag. The CO2 exits the bag and O2 enters the bag which makes it unnecessary to leave air in the bag.
DO NOT float the breather bags in your aquarium.
This would prevent oxygen from entering the bag and could possibly suffocate your fish.
