Introducing the Marina i25 Internal Filter - the perfect addition to any goldfish or tropical tank up to 25 liters. This compact yet powerful filter is designed for use with Marina goldfish aquariums, providing the perfect environment for your underwater friends. With its easy installation and maintenance, the Marina i25 ensures that your tank stays clean and healthy for your fish to thrive. Its slim design means it won't take up much space in your tank, while still providing efficient water filtration. Say goodbye to cloudy water and hello to a crystal-clear tank with the Marina i25 Internal Filter.