The BT1 betta kit from Penn-Plax is an ideal fish tank for bettas, goldfish, and other small species of fish. Each tank is crafted from crystal clear acrylic. Included with each kit is a tank, lid, LED light and internal filter. The filter and LED light share a single power supply, making this tank ideal for areas where power outlets are limited. The 1.5 gallon size of this tank is ideal for desktops, children and first time hobbyists.