This Aquarium internal Filter is both Suitable for fresh or salt water aquarium tanks up to 600 Litres Designed for submersible use only the products shape is triangle but curved at the front so it can fit into the corner of your aquarium tank this product works very well if you do not want to have an external filter. Filter Operation 1. The internal filter works by pulling the water through the small wholes on the front of the filter box. 2. The water then moves up to the top of the filter box and then down through each section of the filter which consists of 4 filter carbon pads 1 bag of ceramic rings and finally a layer of filter foam. 3. The water then pulls back up through a pipe which has the power head attached and then back into your aquarium tank. Features The internal filter has a built in 1400L/H power head and comes complete with all filter media. Venturi aeration nozzle supplied with the power head to create bubbles which will increase oxygen levels of returning water. No air pump needed in principle. Venturi effect: As water is pumped back into the tank, it can also be aerated by a venturi pipe. This accelerates the water flow and draws in a stream of air from fabove the surface. Specification Power consumption: 18w Max Output: 1400L/h H-Max: 1.7m Dimensions: 46 (H) x 18 (Wide to center of the front of curve) 17cm to each corner. UK 3 pin plug with 1.2m of cable Voltage: 220-240v Comply with: CE, ROHS & TUV. 12 Months Warranty