The Marina A131 is the correct Internal Filter system for:
The Marina I25 Goldfish Tank Filter is a powerful, quiet internal filter system that allows water to enter the floss layer where debris gets trapped inside the filter cartridge. The 3-stage filtration of this specially-designed power cartridge includes mechanical, chemical and biological filtration. As the unfiltered water enters the center of the Marina cartridge then flows through the Zeolite chamber, toxic ammonia is removed. When the water then enters the second chamber containing carbon, pollutants and odors are eliminated. The unique flow of crystal clear water returns to the aquarium through a waterfall spout and thereby generates continuous oxygenation.
Marina I25 Aquarium Filtration Specifications:
Be sure to change the filter cartridge as needed for optimum performance of your filtration system. Replacement is quick, easy and mess free. This Marina Internal Filter Cartridge easily clips on Marina Goldfish Aquariums or any other tank up to 6.6 U.S. gallons with the use of secure suction cups included with the filter system.