Its too late now but here is how I transport and I have never lost a big fish. I agree that when possible tell seller to not feed for 2 or 3 days. I use a regular air pump and a ac/dc converter so that batteries are never an issue. I also add amquel to the water so any ammonia that is released will be locked up and not become toxic. Lastly in large moves I have even used cycled sponge filters in the transport tubs so there is filtration. I always have a few extra sponge filters running in my sumps or in growout tanks just in case I need them.
This has worked for me transporting freshwater rays over 1000 miles by moving truck, saltwater fish and invertebrates from the Florida Keys to Michigan, and countless other shorter trips. I hope this helps anyone wanting to transport long distances again.
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