Remove toxins and reduce odor from your turtle's habitat with the Exo Terra Fine Foam Turtle Filter FX-200. Turtles are notoriously messy and the accumulation of waste， uneaten food and decaying plants can cause toxic levels of ammonia in your turtle's water. The Exo Terra Fine Foam Turtle Filter odor-reducing pad works in combination with the dual carbon pads to ensure maximum ammonia absorbing capabilities. It only requires one- to two-month maintenance intervals for turtle tanks and two- to four-month maintenance intervals for other aquatic habitats. It is ideal for use in turtle tanks， paludariums or aquatic terrariums with high biological load.