Here's a picture.
Beware, Wall of Text.
Suppose you have this unique aquarium tank that rolls 360 degrees nonstop with a motor. And you wanted to make sure algae don't grow a lot inside the tanks. And you're lazy.
When considering the old saying "A rolling stone gathers no moss", and you blend the elements into aquariums, what you should get is probably this. This prototype glass/acrylic tank should have meet the needs to satisfy fish breeders.
There shouldn't be any signs of moss or algae growth in this tank, as the roller tank is spun continuous at a slow rate of speed and in the same direction. It's cylinder design won't cause the fish inside to be frightened or causes stress, and it won't make big waves.
The sides of the roller should go underwater, then back up into the air, rinse and repeat. It won't gather anything that may cause it to grow something on the sides of the roller. The only exception is on the side of the stationary wall, where it doesn't rotate.
There's an opening on the stationary wall, which makes feeding times and maintenance easy as pie. When fish produce waste, the waste will always go to the very bottom of the roller, where it'll gather into a mound. That's where cleaning comes easy. Just siphon up the waste and you're good to go.
If you want to place an air hose or filter into it, just make it hook over the opening.
The gray part of the stationary wall is a complex system of keeping the water shut tight inside the tank, and making the roller rotate. It's something simple drawings can't express.
I only forgot to draw or make room for the motor for the roller. Hence, there's the TODO note. Also note that I have not consider consequences of having saltwater inside. It must rust some metals inside of it, so this tank is made for Freshwater species. And I'm not sure where to put this thread, so it's in the Freshwater discussion forums.
End of Wall of Text.
So, does anyone think this is a good idea to try and test? Do you think there are places that needs improvement? It's okay to use the picture freely.