The 10-gal tank is not covered, allowing plant growth through the top. A pair of stands holds the light above the tank. The system is not suitable for keeping terrestrial animals, as the animals will escape. Kit includes tank with plant pockets, fluorescent strip light, pump, submersible heater, filter cartridge, and owner’s guide. The tank measures 20 × 10 × 10" H. Add a 10-gal Accessory Set (item# 161900) and you'll have everything you need, except the plants and animals, to create your own ecosystem. For plants and animals, order our item# 161910 Plant Set and our item# 161920 Animal Set.