The Zoo Med Turtle Dock is a unique floating dock for Aquatic Turtles to bask on. A self-leveling feature automatically adjusts to all water levels. The submerged ramp allows Turtles easy access to a dry basking area for maximum exposure to heat and UVB lamps. Available in multiple sizes to easily accommodate any size aquatic turtle. Perfect basking spot for aqautic turtles Automatic self-levelling Rises and falls with any changes in water level Available in 4 sizes Available in the following sizes:. Mini: 5 gal. & up (3.5" x 8") Small: 10 gal. & up (5" x 11.25") Medium: 15 gal. & up (7" x 15.5") Large: 40 gal. & up (9" x 18")