Buy Aquarium Internal Filters at the Petonus Online Shop

Internal filters with or without a heater – brand-name quality with expert advice

Crystal-clear water and healthy fish in your freshwater aquarium start with the right filtration. An internal aquarium filter is the compact solution for small to medium-sized tanks and stands out for its ease of use, quiet operation, and reliable cleaning performance. In thePetonus Online Shop, you’ll find certified quality from JBL, OASE, and Fluval—brands that have proven themselves in the aquarium hobby for years.

Why internal filters are so important

Food scraps, waste, and plant debris pollute the water and can quickly lead to cloudy water and unstable parameters without a filter. An aquarium internal filter removes these impurities, supports the growth of beneficial bacteria, and ensures even oxygen distribution through water circulation. This maintains the biological balance and keeps your aquarium inhabitants feeling completely at home.

Filter capacity and tank sizes

As a rule of thumb, an internal filter should circulate approximately 1 to 1.5 times the tank volume per hour. For a 60-liter aquarium, this corresponds to 60 to 90 liters per hour; for a 200-liter tank, about 200 to 300 l/h. This keeps the water clear and adequately oxygenated.

Filter Media for Internal Filters

Internal filters can be flexibly equipped with various media. Mechanical filter media such as filter wool, mats, and foam remove dirt particles and ensure clear water. Biological media such as ceramic tubes or sintered glass provide bacteria with the surface area needed to break down pollutants. This ensures effective and sustainable water purification.

Tips for Proper Use

An internal filter should be positioned so that the water flow moves the water evenly throughout the entire aquarium. Mechanical media should be cleaned regularly, while biological media should only be gently rinsed in the aquarium water to preserve the beneficial bacteria. Visually, the filter blends harmoniously into the tank when it is cleverly hidden behind plants or decorations.

Buy internal filters online at Petonus

Whether you’re looking for nano aquarium filters, models for 60 liters, or high-performance options for 200 liters—at Petonus, you’ll find tested internal filters from JBL, OASE, and Fluval. Order conveniently online and enjoy fast delivery and our personalized expert advice.

Buy aquarium internal filters from Petonus now and keep your tank running reliably.