Best guide for Fish Tank Filters: 2021 edition

Why Fish Tank Filters are important? What is the use of Aquarium filters?

Place where living beings stay should be kept clean similarly fish to need clean environment to grow and live a healthy life and fish tank filters help in keeping the water clean.

Every fish tank aquarium need to be kept clean if any fish tank or aquarium gets infected or polluted fish will get affected badly.

Filters remove debris like food particles, decayed food, fish waste harmful specimens or dead plants. Removing this harmful junk material from the fish tank is one of the vital roles of fish aquarium filter.

There are some useful bacteria that live in tank and convert the toxic Chemicals into the useful chemical this is called as nitrogen cycle.

These bacteria colonize near Fish Tank Filters making filters one of the main reasons to be the part of fish aquarium.

Oxygen is needed not only for the fish but also for these microbes to survive as the filter aerates the water it helps in producing oxygen. Without oxygen microbes and fish will perish. Naive fish keepers usually keep their farms in the fish aquarium assuming that Bubbles and waves generated by air pump adding oxygen in fish tank strong assumption

In shot to maintain a nitrogen cycle and to purify water adding oxygen in water to aerate aquarium are important tasks performed by filter in a fish tank.

How aquarium filters work?

Understanding the process behind your fish tank filter is a must in order to know how the filtration process takes place. Why is it important to keep a fish tank filter aquarium? What are the different types of Aquarium / Fish tank filters?

Mechanical filter

Starting with the pretty basic filter called as stage aquarium filtration or a mechanical filtration.

Stage aquarium filtration for mechanical filtration is filtration process that puts a physical barrier to remove solid dirt particles from the water this can be found in the form of foam sponges sieves and matting. By capturing solid matter such as fish stools, surplus food and all other things that turn Fish Tank water Murky or cloudy.

Learn how to treat Murky or cloudy water in fish aquarium here.

As mechanical Filtration process does not take much effort to break most of the aquarium dirt. The mechanical stage filter needs much more maintenance from your side. That includes cleaning foams time to time with water, squeezing out the filthy water into a tub/ container. Periodically replacing the filter media of the mechanical filter is way too much of pain and effort.

Biological Filtration

Biological Filtration enable bacteria present in the aquarium to propagate and break down wastes and filth. Biological filtration is the process of breaking down dangerous ammonia, converting them to nitrites, and then the nitrites to the less toxic nitrates. This is done by the bacteria in the Fish aquarium. The process of biological filtration, also known as the nitrogen cycle, involves the movement of harmful wastes through the filter. Biological filters should be checked frequently to ensure dirt particles do not get away from the mechanical filters, jamming the biological filter and decreasing effectiveness and other abilities.

Best External Hang on Filter 2021

Atman’s Q 7 M is no doubt BEST EXTERNAL HANG ON FILTER

  • Power: 6W
  • Voltage: 220-240V
  • All round Filtration
  • The motor is built in the filter box, integrated molding, low noise and leak proof
  • External filter box
  • Two layer filter basket


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External Hang on Filter HF-0400


  • Voltage:220-240V/50Hz
  • Material: Plastic
  • Power:4.4W
  • Dimensions:146x89x164mm
  • Suitable for the fish tank:30-60 Liter
  • Installation method: Tank back hanging external.
  • Mechanical, Chemical, Biological filtration.
  • Ideal for freshwater & marine aquariums.


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Best Pond Filter 2021

External Pond filter EF-5000C +UV

  • Water resistant ballast
  • E-39 connections
  • Quartz sleeve
  • PL compact UVC bulb
  • Safety switch built into the cap
  • Indicator light
  • Suit for Water Pump: 10000-150000
  • In Out :1.5
  • UVC Power: 9W
  • Capacity: 27.5L
  • Filter Height: 45cm
  • Atman‘s External filter with UV EF-5000C+UV.
  • Best and High quality filter for puddle or Pond.
  • With a self-contained UV sterilizing device.
  • With a two-way function for automatic dirt cleaning.
  • Applicable to water: – filtering projects in the pond /puddle, garden, lawn and Huge- fish tank.


Click here to buy :  Best Ef-5000c + UV External Filter

Best External Filter in 2021

Atman’s Best External Filter DF-700 

Click here to buy BEST AT DF 700 External Filter

  • 100% effect of water clean
  • Easy to clean and operate
  • Save the space of the aquarium
  • Suitable for fresh and marine water
  • Simple set-up and ease installation
  • Modular design for a variety filter medians

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