The Penn-Plax Floating Turtle Pier Platform has everything a basking platform needs for turtles， frogs， newts or salamanders. It’s designed to float at water level and allows you to maintain an ideal water level while compensating for evaporation. The textured ramp secures to the edge of the platform and leads down into the water for easy access to the basking ledge. Extension pylons are included to adjust the height up to 12" (small) or 16" (large)， and the smaller platform includes an optional filter holder that fits the Penn-Plax Reptology Internal Filter 45 (sold separately). This platform looks like a real pier and works great in both small and large tanks.