Suitable for all 15 Liter (4 gallon) BiOrb Classic, Flow, Halo, Life and Tube Aquariums. Will also fit all BiOrbs larger than 15 Liters. The Autumn 15L Decor Set includes an autumnal maple with orange moss pebbles, red starfish and a flame sea lily for a seasonal effect. Items are safe for freshwater, tropical and saltwater aquarium set ups. Enjoy significant savings when selecting the kit in comparison to buying items separately. BiOrb Autumn Maple Tree x1; Orange Moss Pebbles x1 (4 to 5 pebbles); Red Starfish Set x1 (3 pieces); Flame Sea Lily x1.