Aquarium Submersible internal Filter. Suitable for Small and Medium size aquarium Complete with filter cartridge and venture air diffusor, twist outlet for outflow direction. Outflow nozzle with 2 positions (maximum water outflow or venture, water inlet at bottom and side for total filtration. Practical suction-cup attachment. Eheim pick up system for easy and safe maintenance motor casing and cable remain in place in the aquarium while the filter compar ent slides out easily and safely for cleaning removing all dirt particles. Our chillers uses the environmental friendly refrigerant r-134a. Lower noise design, whilst the digital temperature controller ensures that the selected temperature is maintained.