Shipping Fish In Hot Weather

[rdebonis]

Hobbyists and professionals who ship fish generally agree that Summer is the most stressful time for shipping fish. Does anyone know if there is anything you can put in the shipping water that will keep the Oxygen level high if the water warms up in hot weather? To the best of my knowledge, the warmer the water the less oxygen it holds. In addition, is there anything that you can add to the water to keep the ammonia levels lower in the shipping bag that won't create a problem with the pH.