Ostatnio aktualizowane: 20.10.20

 

A home aquarium consists not only of fish and decorations. It is often necessary to install many devices that will take care of the quality and temperature of the water. One of the necessary equipment is a filter that regularly removes impurities. However, choosing the right device for your aquarium can be difficult. Therefore, we present the most important advantages of different types of filters to help you make your decision.

 

Why is a filter needed?

Over time, the water in the aquarium begins to accumulate various impurities in it. They can come from outside or directly from processes inside the tank. Additionally, heat and access to sunlight contribute to the growth of algae. As a result, the water becomes cloudy. Fish also secrete ammonia and any food they eat is broken down. All these factors make the water inside the aquarium smell bad and change color. In the case of small tanks, you can try to replace it regularly. However, the aquarium filter is the most effective in purifying water . The devices can be found in any pet store. Before making your choice, it is worth familiarizing yourself with the types of filters so that you can choose the best one for your aquarium.

Filter types

There are three types of filtration, each based on different factors. However, it often happens that one device combines all three types. So we distinguish mechanical, biological and chemical filters:

♦ Mechanical filtration – consists only in removing physical dirt from it. For this purpose, synthetic wool, fleece or nylon are usually used. Dirty water is passed through this material, and sediment and impurities remain on the filter. Filter cartridges should be replaced regularly, because depending on the degree of contamination of the aquarium, they become clogged and cannot be used again. This type of cleaning will work when you want to clean the tank of plant debris, fish droppings or dust.

♦ Chemical filtration – filters that clean the aquarium chemically are usually filled with cartridges with active carbon or hydrated silicates. When polluted water flows through them, they trap chemicals that can harm fish. The contribution neutralizes the products of changes taking place in the aquarium, which are unnecessary for the functioning of the entire ecosystem. You can also add other substances to chemical filters that will soften the water or change its pH. Special peat inserts can also provide the fish with vitamins and hormones. Chemical cartridges should be replaced, as well as mechanical ones, it is enough every few weeks.

♦ Biological filtration – the biological filter is considered the most important of all three. The cartridge contains special nitrifying bacteria that break down the ammonia secreted by the fish and turn it into less harmful nitrites, and then into nitrates. These substances go back to the tank where they are used by plants as food. However, nitrates and nitrites can be harmful to fish if they are present in large amounts. Therefore, it is worth changing some of the water in the aquarium from time to time, even if it has been filtered recently.

 

Types of filters

There are two types of aquarium filters. They can be placed inside or outside the tank. Choosing the right model depends primarily on individual needs. Internal filters are mounted inside the aquarium and immersed in water. The most commonly used cartridges are biological and mechanical. The internal filters can be attached to the wall of the aquarium or, on some models, placed under a layer of gravel. Bacterial colonies at the bottom purify the water flowing through them. Filters cannot be placed on the bottom of the tank when the substrate consists of fine gravel or active granules. The advantage of this type of devices installed inside the tank is high efficiency during mechanical filtration.

External filters are usually placed under the aquarium, so it is worth placing the tank on a properly adapted cabinet. They consist of several smaller tanks through which water flows. They are separated by walls, and each chamber has a different filter. Outdoor devices include bucket and cascade models. Both variants are mounted outside the water tank. Bucket filters collect water through a special conduit. Separate inlet and outlet prevent dirty and clean liquids from mixing. The big advantage of bucket filters, which consist of several smaller tanks, is their efficiency. In addition, a wide variety of cartridges can be used, from biological to mechanical. The second type of external filters, cascading, are placed on the wall of the aquarium. They should be in contact with the top edge, because the water flows out of them like a waterfall. Next to the outlet, there is a special tube that takes the contaminated fluid from the tank. Inside the device, all impurities, both physical and chemical, are filtered. Then the water is poured back into the aquarium. Cascade devices consume less energy than bucket devices, but are just as efficient. They allow the simultaneous use of several different filters for water purification. The advantage of all external devices is that they are easy to clean as they are not in the tank. In addition, they do not take up space in the aquarium, thanks to which the fish have more free space to swim. both physical and chemical.

Then the water is poured back into the aquarium. Cascade devices consume less energy than bucket devices, but are just as efficient. They allow the simultaneous use of several different filters for water purification. The advantage of all external devices is that they are easy to clean as they are not in the tank. In addition, they do not take up space in the aquarium, thanks to which the fish have more free space to swim. both physical and chemical. Then the water is poured back into the aquarium. Cascade devices consume less energy than bucket devices, but are just as efficient. They allow the simultaneous use of several different filters for water purification. The advantage of all external devices is that they are easy to clean as they are not in the tank. In addition, they do not take up space in the aquarium, thanks to which the fish have more free space to swim.

 

 

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