http://www.straitstimes.com/BreakingNews/Singapore/Story/STIStory_748702.html Researchers and students have come up with a stackable fish farm that is among the first such in the world. The method uses 1 sq m, connected cubes filled with water to rear fish on land…. The cubes can be stacked up to four levels…. ….now produces up to eight tonnes of fish a …