Tetra CR Filter Rings Small Ceramic Filter Rings for Tetra Aquarium External Filter EX 400 Plus up to 1000 Plus

Ceramic filter rings in size S - specially developed for the Tetra EX 400 / 500 / 600 / 700 / 800 / 1000 Plus aquarium external filter Filter systems ensure fish and plant-appropriate water quality in the aquarium. Large surface area for safe mechanical filtering Thanks to the use of the Tetra CR filter rings, co materials are mechanically filtered and the water flow in the filter is optimised The hollow ceramic filter rings with a very large surface area mechanically filter large particles from the aquarium water. They control the flow direction of the water in the filter and ensure the even water flow Rinse in warm water before use / reusable several times