Blue Planet Tank Maid Internal Filter Pro 700 The Blue Planet Internal filter sit inside your aquarium, they contain sponge and charcoal, but you also have the option to fill with noodles and other filter media. Attaching airline to the outlet of the filter will draw air in creating a stream of bubbles from the filter. 700L/Hr, 90cm head height. For 70L Aquariums Flow rate is not adjustable. Power usage 10watts. Available in a variety of sizes to suit different species and tank size Great for removing excess dirt or additional filtration when you have large fish that are starting to outgrow their current home.