I need to ship my cousin his 2 fish, 2 shrimp, and 5 corals this weekend. He lives about 6 hours away. His mom is going to pick up everything Saturday morning. I have a few small coolers that I recieved my stuff in, but no Bags. I'm worried about oxygen level for that long. I suspect the trip is going to be about 8 hours for the critters. Any suggestions would help greatly.