First and foremost, a quality filter ensures clean water and promotes fish health. In conjunction with regular partial water changes, filters help keep the ecosystem balanced. Filters also help generate flow, absorb substances that causes turbidity, and enrich the water with oxygen.
Filters clean water by using mechanical and biological filtration. Mechanical filtration removes suspended matter and coarse dirt particles, such as feed residues, plant parts, and animal waste. Biological filtration converts or removes bacteria as microorganisms settled in the filter feed on organic matter. The beneficial bacteria that settles within the filter media help to break down and remove waste from aquarium inhabitants. Filters can additionally use chemical filtration. Chemical filtration removes dissolved particles, toxins and odors from the aquarium and helps to maintain water quality.
External Filters
External filters typically have different types of filter media in several layers throughout the filter unit. These filters operate outside of the aquarium and can be conveniently stored in a cabinet under the aquarium, making them easily accessible for maintenance.
Internal Filters
An internal aquarium filter is placed inside the aquarium and is particularly suited for aquariums up to 55 gallons. You can also use an internal filter as a secondary filter or if space is not available externally. A key advantage is that no visible tubing connections interfere with the aquarium's overall aesthetic.
Power Filters
Power filters hang on the back or side of the aquarium. Water is pulled up through the intake and circulated through the different stages of filter media, which collect debris and provide optimal water quality and clarity. When maintenance is needed, the filter media cartridges can quickly and easily be checked and cleaned, or replaced.
Â