What is an External Aquarium Filter?
In a fish tank the filter is its life. Without filtration the water will turn stale and the life rock, plants or fish will die. Aquarium Filters keep the water clean enabling the fish and plants to survive.
The external aquarium filter design has the benefit that it can be stored under your water tank in the stand is not only saving you space inside the aquarium but it also reduces the visual clutter that can distract from the beauty of your aquarium.
The Acquachiarausa/Canister Filter is basically a sealed container filled with three layers of filtration media: mechanical, chemical and biological filter media. Aquarium water flows into the canister and is pumped through the media and then introduced back into the aquarium tank. Like this only the intake hose and return line are visible within the aquarium.
Finding the right Filter for your aquarium
As a rule of thumb for your aquarium filtration you could say that the filter should be able to run all the water in the tank at least 2 times through the filter per hour. As an example you have a 50 gallon/190liter tank, you should have a filter that can handle at least 100 gallon/400 liter per hour. In a borderline situation it is always better to take the next bigger filter than the smaller one.
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