I'd love to have a setup like that.. but i do wonder about how the water gets around and how the fish swim straight up.. maybe they have a flow strong enough going in a circle thru the whole system that moves the fish along or something and at some point runs thru a filtering setup?
wow!! definitely a set up for timg to explore!!!! that would keep him busy along with the upside down tank thing! that is truly amazing! would have to keep the algae in check though cos it'd be near impossible to clean unless it could be dismantled into sections and cleaned? i'm curious as to how the fish swim "up". the water must stay in place in a vacuum kinda way like the upside tank theory, and as flbettacouple said there must be a strong current to help the fish along!
They only have a small upward trip before it starts to get a bit less. It would rely on the upside down tank theory to suction the water in but any air bubble getting in would surely result in it loosing that vacuum and water pouring out everywere?
Theory says that it does work on a similar method to the one I have got, and my guess would be that there is a vacuum connected somewhere along the top section.
As for the fish swimming vertically, I don't think it would be too much of a problem, as my angels and the goldfish go verticle to get into the water column now without any problem. I would think that those fish have probably been in there for a while though, and have grown with the setup. I'd hate to do a major water change on that lot! The flute goes far enough into the tank to not have to worry about air getting in on a 25% change though.
For filtering, it's anyones guess, but probably a sump hidden in the background somewhere taking from one and returning to the other. The syphon effect may keep them balanced. If you look at the images, you can see the inlet/outlet of some sort of filter behind the tanks, which lends to this theory.
I think I'll take a rain-check on this one though, I have enough going on already! Lol If anyone out there is game, let me know!