Types of Aquarium Filtration Systems: Keeping Your Tank Clean and Healthy

Contributing Editor: Ravi Teja Mandapaka
Maintaining a healthy aquarium relies on the crucial task of keeping the water clean and free from contaminants. Achieving this requires effective filtration systems. Aquariums have three primary filtration methods: mechanical, biological, and chemical. Everything will play an essential role in seeing that an aquatic environment is thrived on.
Biological Filtration: Biological filtration is when beneficial bacteria break down ammonia and nitrite, transforming them into less toxic nitrate compounds. To facilitate the growth of these beneficial bacteria, oxygen-rich water and surfaces for attachment, such as rocks or sand, are essential. All aquariums should incorporate biological filtration, and for small fish populations, this may be sufficient on its own. However, most aquariums use a combination of filtration methods.
Chemical Filtration: Chemical filtration involves using additives to remove dissolved wastes from the water. Activated charcoal is a common choice for chemical filtration.
Mechanical Filtration: Mechanical filtration is the removal of solid particles from water by circulating it through a filter medium. While crucial for removing debris, mechanical filtration alone is insufficient because it doesn't address ammonia, nitrate, or nitrite levels. However, it prevents free-floating waste from breaking down into harmful substances. Routine maintenance is necessary to clean or replace the filter medium every few weeks—additionally, mechanical filtration aids in oxygenating the water.
Choosing the Right Filtration System: To maintain an aquarium effectively, the filter should cycle the entire tank's water at least four times an hour. When selecting a filtration system, consider whether it provides biological, chemical, mechanical filtration, or a combination of these methods. There are several common types of filtration systems available:
1. Box Filters: Box filters, also known as corner or internal filters, are compact and budget-friendly. They can be equipped with various filter media and are suitable for small aquariums, typically up to 20 gallons. Some box filters require an air pump and airline to circulate water, which also aids chemical and biological filtration.
2. Canister Filters: Canister filters are robust and ideal for medium to large tanks, typically exceeding 400 liters. Positioned outside the tank, they can be discreetly concealed. Canister filters provide excellent mechanical, chemical, and biological filtration. They force water through the filter media under pressure, making them suitable for heavy loads. However, they can be challenging to disassemble for cleaning and priming.
3. Diatomic Filters: Diatomic filters are specialized filters designed to remove tiny particles, providing "polishing" of the water. They are used for specific situations, such as addressing diatomic algae problems.
4. Fluidized Bed Filters: Fluidized bed filters are efficient biological filters that use sand or silica chips as the filter medium. These units hang on the back of the aquarium, offering both mechanical and biological filtration.
5. Power Filters: Power filters, or hang-on-back filters, are the most commonly used filters. They provide mechanical, chemical, and biological filtration simultaneously and are easy to install and maintain. They hang off the back of the tank and are often combined with a bio wheel for enhanced biological filtration.
6. Sponge Filters: Sponge filters attach to a power head or air pump tube, providing mechanical and biological filtration. They are suitable for tanks with fry and hospital isolation tanks.
7. Trickle Filters: Trickle filters, also known as wet/dry filters, expose water to air, fostering beneficial bacterial colonies. They are famous for saltwater tanks and are gaining popularity in freshwater setups. Chemical filtration can be added by using chemical media in the filter.
8. UGF (Under Gravel Filter): UGFs are a classic aquarium filter with a plate filter beneath the substrate. An air pump draws water through the substrate, mechanically removing particulate matter. While cost-effective and easy to set up, they tend to clog and are unsuitable for planted tanks.
Conclusion:
In conclusion, selecting the right filtration system for your aquarium is crucial to maintaining a thriving aquatic environment. Understanding the different filtration methods and the specific needs of your tank will help you make an informed choice and keep your fish and marine life healthy and happy.
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About Author
Ravi Teja Mandapaka is a multifaceted scholar, poet, and passionate advocate for animals. From English literature to agricultural sciences, from field hockey to music and the arts, Ravi's diverse interests converge in his unwavering commitment to animal welfare. He believes in a journey where compassion meets creativity, and academia blends with advocacy.
https://www.linkedin.com/in/ravimandapaka/