Canister Filters vs HOB vs Internal Filters
Many beginning aquarists choose economical, easy-to-use
power filters for their first aquarium. However, as they advance, many
hobbyists find it necessary to upgrade to a more versatile filtration system. A
canister filter may be the right choice if you need a powerful filtration
device that allows custom filtration with exceptionally large media capacity.
What is a canister filter?
A canister filter is essentially a sealed container filled with various filter media. Aquarium water is drawn into the canister and forced through the
media and then introduced back into the aquarium. Unlike power filters, most canister filters sit inconspicuously
under your aquarium - only the intake hose and return line are visible within the aquarium. This space-saving
design has the added benefit of reducing visual clutter that can detract from the beauty of your aquarium.
Canister filters can be used alone or in conjunction with a variety of aquarium equipment for
advanced filtration. Any in-line device such as BIO-Wheels, UV
sterilizers, or even water chillers can be plumbed to a canister filter
for a comprehensive system. You can even create a custom water flow system simply by attaching a spray
bar, water return installation kit, or Switching Current Water
Director to the return line. Your options are only limited by the flow rate of your canister
filter and your imagination.
The principle advantage of canister filters over power filters is their roomy media baskets. The number of
baskets and the total media volume will vary from model to model, but all canister filters are made to filter large
amounts of water. Use any desired combination of mechanical, chemical, or biological media for superior filtration
of larger or more heavily stocked aquariums. For example, the Eheim Classic 2262 has a total media capacity of 3.6
gallons and is designed for aquariums up to 320 gallons.
Whether you're setting up a larger aquarium or simply wanting to upgrade your existing filter, the
versatile and reliable nature of a canister filter makes it a great choice. Canister filters are made for enhanced
performance and convenience.