The Tetrafauna ReptoFilter for Frogs, Newts & Turtles provides crystal clear filtration for aquatic terrariums. It uses patented Whisper technology for silent operation as it moves the water through three stages of filtration. The removable filter cartridges catch organic debris and remove odors and discoloration from your tank. This filter works in as little as three inches of water, so it’s the ideal choice for the shallow pools found in turtle, newt and frog habitats. It’s also great for creating waterfalls. Simply attach the suction cups to a terrarium wall and cover the filter with decorative rocks or plants. The green color makes it easy to conceal, and the protective lid keeps reptiles out. The medium 90 GPH filter is effective in terrariums up to 20 gallons.