A Member of this forum has done a similar thing with thier tank. They had (I think) two 55G tanks with perspex pipes runing up und over. Was very cool with photos and everything. They also had a small version in a puffer tank where fish could go round a loop outside the tank. I will post a link to the thread if I find it.
Ive seen that before, but still can't get enough of it.
My only question is how do you clean all the poo that has settled in the tubes?
Ah haw my next invention will be a remote controled power head....and to fallow that is the remote brine shrimp....just think of it.....it would be like a video game for the home entertainment aquarium....through in a shrimp and steer him clear of danger... .....just kidding.....thanks for posting that up..... there goes my xmas money = (plexy, glue, silicone and doubled water bill)