The Zilla Aquatic Turtle Habitat Accessory Kit is ideal for habitats 20 gallons or less.
Included in Kit:

2 reflector domes 8.5 inches
1 dome spring clips
Day bulb 20W
Water conditioner 2OZ
Humidity and temp gauge
SmartClean internal filter
Floating basking platform small
Shrimp munchies
Setup guide

*Enclosure not included*