Baby biOrb has all the features and benefits of the larger biOrb in a more compact size, perfect for small spaces like a desktop. Made from crystal clear acrylic that is 10 times stronger than glass, has low voltage light and air pump, patented filtration and media(gravel), and includes water chemicals, spare light bulb, instruction booklet and food. You just add water and fish! 4 gallon capacity. Available in Black or Silver.