There are quite a few things to consider with huge aquariums like this. What happens if one of your fish is ill? How the hell do you get it out? There is absolutely no way on God's earth that you could treat a tank of this size. Assuming that it's not completely overstocked,nitrate levels would probably take quite a long time to reach maximum levels. At some stage a water change will need to be carried out, I'd like to see how this is done. Do they use tap water?, How much water conditioner is used? Christ, so many questions,I would love it if the guy comes on here and gives us a little talk. Hey mate, if you're reading this
I know that the Plymouth aquarium have got some extremely sophisticated equipment that look after their marine tanks. We're talking many hundreds of thousands of £'s here.
that is the mother of all aquariums, the sort of thing you find in a large commercial aquarium. That certainly is a labor of love, it must cost an absolute fortune to run, I dread to think of running cost each year. However, if you have the money, why not? I hope he's got good insurance 
