chad...you are wrong on mostly everything you said thus far.
1-reefs actually do have very strong currents, because they are in shallow water.
2-fish are not domesticated. they are pulled from the ocean and immediately put in our closed systems. 99% of the fish we keep are completely "wild".
3- we're not talking about a closed tube. we're talking about a tube that has 4 holes in it. you might want to look at the first page again. there are photos there. besides, i never stated anything other than the fact that you can't compare fish to humans. i never stated for or against the idea of a pump in this pipe thing.
4- i didn't say anything about the intelligence of a fish, but apparently, according to you, any creature that recognizes where food comes from is smart. well, that includes just about every creature on the planet.
5- do you think fish that live in a creek only swim downstream? where do they start from then? how did they get to the beginning of the stream?