here is a trick that i use when transporting fish or anytime i really stress them out .... take and add 3 drops of hydrogen peroxide per gallon of water to theri tank ... it will break down into water and oxygen and help add more oxy to the water that way .,... it works normally with in just a couple mins and will stop the whole shoal from panting jsut that quick....i also use it when im transporting any fish even tho i do most of the transporting in a live bait bucket (styrophoam lined with an air pump and stone) its liek 3 gallon size and i put in about a cap full ...fish that i ahve transported this way have been far less stressed than any other way that i ahve tried ... im sure that its because they ahve the added oxy from the Hydrogen peroxide ... Mickey