Many types are commercially available. Generally, the dissolved oxygen content in the water is the factor that determines whether the fish live or die. Fish should not be fed for at least 24 hours before transport so that excessive fish wastes do not accumulate during transport. Fish wastes and regurgitated feed consume large quantities of oxygen and can produce ammonia and carbon dioxide problems. Transporting fish in cool weather or in cool well water increases fish survival.
Cool water holds more oxygen than warm water, and fish consume less oxygen at lower temperatures.
Also, large fish consume less oxygen by weight than small fish. It is a good practice to have an oxygen probe in the hauling tank and the meter in the cab of the truck to monitor oxygen concentrations during transport. Fish health and survival depends on your ability to limit stress. Stress from netting, loading, hauling, and stocking weakens the fish and makes them more susceptible to disease and water-quality problems. The more you limit stress factors, the healthier the fish will be.