Desktop AquaTerrium 3 Chamber Fish Tank, 3.25-gal; Start building the water-filled wonderland of your dreams with the Desktop AquaTerrium 3 Chamber Fish Tank! This unique aquarium features three chambers that harmonize to create one full-fledged biological ecosystem. Its tiered setup helps keep the circle of life running smoothly, as it helps plants absorb fish waste while simultaneously purifying the tank’s water. The filtration system boasts a submersible filter pump, a bio sponge and two circulating waterfalls—which combine to help produce crystal clean water. Plus, each chamber of this aquarium can easily hold a variety of small fish species, including bettas, tetras, danios, barbs, rasboras, small crustaceans and shrimp.