There is no easier way to enjoy the magic of live fish, short of jumping in a lake. The Aqua Plus Deco Aquarium is all set to go: EZ open lid, pump, filter and cartridge are included. Even the gravel and plants come with it, and the included background has reversible marine scenes to make your fish feel at home. Just add water! * 3.5 gallon aquarium with easy opening lid * Includes pump, filter and filter cartridge * Comes with decorative gravel and 2 plants * Double sided marine scene background