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Written by Leon Huang
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Tuesday, 26 July 2005 |
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Page 4 of 9
Internal canister filters
This filter sits right inside your fish tank's water and does its work
there. They are mostly very cheap, with some brands costing more due to
better features.
How it works
An impeller motor inside the filter pulls water in and through its filtration media, and back out into the fish tank.
"This filter is hands-down the best choice for small planted fish tanks
as it causes next to no water surface disturbance."
Pros
This filter is hands-down the best choice for small planted fish tanks
as it causes next to no water surface disturbance. This minimizes
carbon dioxide loss, which is important for planted fish tanks.
Being underwater makes the filter extremely silent too.
Cons
The problem with this filter is its size. It is simply too small to
contain enough filtration media for larger fish tanks. And if
manufacturers make them bigger, it would take up too much valuable
space in the fish tank.
That is also why this filter is mainly used for planted fish tanks.
Since plants contribute to waste absorption, thus it is generally
alright to use a weaker filter for its other benefits.
Just like the sponge and the corner filter, particles will start flying when you pull it out of the fish tank.
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