Suitable for small tank, plant tank, shrimp aquarium and small marine aquarium – High quality filter medium with sponge material and renewable cartridge – The four safety locks to ensure and prevent water leakage – Adapt the filtering design and easy to operate – Enclosed with automatic exhaust tube – Portable filter chamber which are easy to clean and change the medium – Can be hanged on the tank with CS301 DoPhin Hang-on Accessories (sold separately)Features – Self-priming system – Provide superior water quality – Quick and easy disconnect system – Easy to adjust water flow rate – Mechanical, biological and sterilization system – Comes with UV light to eliminate bacteria, virus and to reduce algae, green water (Except CF 300) – Suitable for freshwater, saltwater tank, plant tank, shrimp aquarium and small marine aquarium – High quality filter medium with sponge material and renewable cartridge – The four safety locks to ensure and prevent water leakage – Adapt the filtering design and easy to operate – Enclosed with automatic exhaust tube