10 Best External Aquarium Filter Review

Updated on: August 2021

Best External Aquarium Filter Review in 2021


Polar Aurora Free Media 3-Stage External Aquarium Filter 265gph with Builtin Pump Kit Canister

Polar Aurora Free Media 3-Stage External Aquarium Filter 265gph with Builtin Pump Kit Canister
BESTSELLER NO. 1 in 2021

Fluval 306 External Filter

Fluval 306 External Filter
BESTSELLER NO. 2 in 2021

Hydor Professional External Canister Filter – Aquarium External Filter – Telescopic Intake Tubes, Easy Priming – EcoSystem in a Box – Biological, Mechanical, Chemical Filtration – 600 to 345 gph

Hydor Professional External Canister Filter – Aquarium External Filter – Telescopic Intake Tubes, Easy Priming – EcoSystem in a Box – Biological, Mechanical, Chemical Filtration – 600 to 345 gph
BESTSELLER NO. 3 in 2021
  • The hydro professional 600 Aquarium External 345GPH Filter is a complete eco-system in a box
  • All the biological, mechanical and chemical filtration that any environment requires for a healthy and long-lived Aquatic experience
  • From the easy priming feature to the telescopic intake tubes, everything had been made easy

Polar Aurora Free Media 3-Stage External Aquarium Filter 265gph with Builtin Pump Kit Canister (265 GPH with Media)

Polar Aurora Free Media 3-Stage External Aquarium Filter 265gph with Builtin Pump Kit Canister (265 GPH with Media)
BESTSELLER NO. 4 in 2021
  • Good for up to 75 gallon fish tanks SunSun parts can be applied Flow rate: 264 GPH (1000L/hr) Pump Power: 18W Hose size: 3/4" Max-H: 4.6 feet
  • 3 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter. No UV Light!!
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Canister filters for aquariums use high water pressure, from a properly powered pump, to force water through the dense filter media. A pump can draw water from an under-gravel filter, and run it into a canister for double filtration
  • The three flexible media trays allow you to add other filtration media such as SunSun's activated carbons, ceramic rings or bio-balls to achieve excellent mechanical, chemical, and biological filtration.

Marineland Magniflow Canister Filter For aquariums, Easy Maintenance

Marineland Magniflow Canister Filter For aquariums, Easy Maintenance
BESTSELLER NO. 5 in 2021
  • 3-STAGE FILTRATION: Water flows through media layers to filter water and ensure a clean aquatic environment.
  • VERSATILE: For freshwater and saltwater aquariums.
  • EASY MAINTENANCE: Valve block for quick release to shut down water flow – separates from housing for quick, spill-free maintenance.
  • THREE SIZES AVAILABLE: Comes in 220 GPH, 360 GPH and 360 GPH sizes.

SunSun HW-302 3-Stage External Canister Aquarium Filter 264GPH

SunSun HW-302 3-Stage External Canister Aquarium Filter 264GPH
BESTSELLER NO. 6 in 2021
  • Canister filters for aquariums use high water pressure, from a properly powered pump, to force water through the dense filter media. A pump can draw water from an under-gravel filter, and run it into a canister for double filtration
  • 3 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Provides quiet, efficient filtration for fresh and saltwater aquariums is great for living rooms, offices or bedrooms

SunSun Sun HW-404B 525 GPH 5-Stage External Canister Filter with 9W Uv Sterilizer

SunSun Sun HW-404B 525 GPH 5-Stage External Canister Filter with 9W Uv Sterilizer
BESTSELLER NO. 7 in 2021
  • Good for up to 150 gallon fish tanks
  • Dimension: 11" L x 11" W x 19" H
  • Flow rate: 525 GPH (2000L/hr)
  • Pump power: 55W
  • Built in 9 watt UV sterilizer for controlling algae spores/bacteria and promoting clear water
  • Refer user manual provided in product details section for information regarding product assembly, usage and troubleshooting.

Penn Plax Cascade Hang-on Aquarium Filter with Quad Filtration System Cleans Up to 100 Gallon Tank (CPF5)

Penn Plax Cascade Hang-on Aquarium Filter with Quad Filtration System Cleans Up to 100 Gallon Tank (CPF5)
BESTSELLER NO. 8 in 2021
  • Hang on aquarium filter quietly delivers 300 gallons per hour of crystal clear water for your fresh or marine aquariums from 55 to 100 gallons in size.
  • Revolutionary Bio-Falls Quad-Filtration system provides efficient filtration with anaerobic bacteria for additional ammonia and nitrite removal providing maximum oxygenation.
  • Activated carbon cartridge removes harmful chemicals, toxins, odors, discoloration, and other contaminants for your aquarium.
  • Internal sponge optimizes colonization of beneficial anaerobic bacteria and polyfiber floss cartridge traps floating particulate matter.
  • Adjustable flow knob allows you to reduce filtration during feeding times or as needed. Aquarium filter is recommended for both freshwater and saltwater applications.

SunSun Hw302 265GPH Pro Canister Filter Kit

SunSun Hw302 265GPH Pro Canister Filter Kit
BESTSELLER NO. 9 in 2021
  • HW-302 Pro Filtration Kit, Good for up to 75 gallon aquariums
  • Flow rate: 265 GPH (1000L/Hr)
  • Dimension: 9" L X 9" W X 15.5" H
  • Pro Kit Includes Canister Filter, 3 White Filter Pads and 3 Media Baskets
  • Includes 1lb of Premium Filter Carbon, 1lb of Ceramic Rings and 1 Set of Bio Balls

Polar Aurora 3-Stage External Aquarium Filter 265GPH with Builtin Pump Kit Canister New(265GPH)

Polar Aurora 3-Stage External Aquarium Filter 265GPH with Builtin Pump Kit Canister New(265GPH)
BESTSELLER NO. 10 in 2021
  • Good for up to 75 gallon fish tanks SunSun parts can be applied Flow rate: 264 GPH (1000L/hr) Pump Power: 18W Hose size: 3/4" Max-H: 4.6 feet
  • 3 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter. No UV Light!!!
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Canister filters for aquariums use high water pressure, from a properly powered pump, to force water through the dense filter media. A pump can draw water from an under-gravel filter, and run it into a canister for double filtration
  • The three flexible media trays allow you to add other filtration media such as SunSun's activated carbons, ceramic rings or bio-balls to achieve excellent mechanical, chemical, and biological filtration.

The New England Aquarium

The New England Aquarium has a great exhibits, special programs and even an IMAX theater. Here are some tips for getting there and enjoying your visit.


Getting to the New England Aquarium: location, transport, best times to go.

Where it is:

The New England Aquarium is located in a very scenic area of Boston right on the water at Central Wharf. While you won't see any patriots throwing tea over the side of any boats, the area is very close to the famed Quincy Market and Fanueil Hall among other historic attractions. The aquarium is also right next to a very large and attractive Marriot Hotel. It's a pretty area.

How to get there:

As with most locales in Boston, the New England Aquarium is very accessible to people already in the city via a combination of public transportation and a little walking. Whatever line you ride on Boston's famous "T" subway (Red, Orange, Green) your goal is to get to the Government Center Stop and hop on the Blue Line there headed to the Airport. Don't wait to get off at the airport though; get off at the Aquarium stop.

If the weather's in your favorite, you can also walk right from Government Center. Outside the station cross Congress Street, go past Quincy Market and that whole area to the Rose Kennedy Greenway (named after JFK's mom) and head right. You'll see the Marriot and the Aquarium.

For in-depth directions on how to get to the New England Aquarium from out of town, check the website at www.neaq.org. In most cases, you take I-93 in the proper direction for where you are in proximity to Boston than take an exit usually marked as heading toward the Aquarium. You get to Atlantic Avenue and there will be signs letting you know where you're headed.

When to go:

If you're taking the T or your car, you can enjoy the New England Aquarium even when it's raining. One show requires a quick walk outside and up a gangplank, but you'll be fine. In the good weather, it's a very pretty area and you can enjoy the nice views from outside and the aquarium itself.

I would caution against going to the aquarium in the middle of summer. Not only are you going to be fighting a tide of summer camp field trips as you go through the small exhibit rooms and up various ramps, but, the aquarium can get humid. I guess it's the temperature control and all that water. I don't know. But it's a tad balmy.

The Aquarium Itself: exhibits, must-sees

The first thing to know about the exhibits at the New England Aquarium is that they're in a space that isn't huge. I think you can probably see everything in 2-3 hours, max. As you visit, there are some definite highlights you'll want to check out.

First, there's the "giant ocean tank." In the center of the aquarium is a giant fish tank with all manner of beautiful and exotic sea life. As you walk up the central ramp, take your time to watch the different creatures. Fan favorites include the giant tortoises, the small hammerhead sharks and some gorgeously colorful tropical fish. Throughout the day, there are feedings where you can watch the New England aquarium personnel dive into the tank and feed the animals living there. And don't worry you can't miss the giant tank- even if you tried- it's central to the aquarium's structure.

The penguins are also a big hit. They swim, preen and socialize on rock formations on the bottom floor of the aquarium. You can also watch the aquarium-keepers feed these guys. There are three different penguin types in the exhibit. You can learn more about them from various talks given over the course of day.

The Edge of the Sea exhibit is also a crowd-pleaser, especially for little kids antsy for some hands-on action. Here, people can pick up sea urchins, horseshoe crabs and other non-threatening sealife forms in a small tank. There are educational talks about the animals during the course of the day.

The Harbor Seals are fun, too. Outside the aquarium, they occupy a big tank and entertain the crowds just being harbor seals. If you're in the neighborhood and don't want to actually go into the New England Aquarium, you can still take the kids by to see the seals in action.

Other interesting places to check out: tanks displaying local sea life, a look inside the aquarium vet clinic, and the jellyfish display.

Aquarium Extras: sea lion show, imax, whale watch, educational programs.

Of course the New England Aquarium offers more than just the traditional exhibits. There's also a sea lion show, an IMAX theater, a whale watch, and many educational programs.

The Sea Lion show takes place on a ship just outside the aquarium and up a gangplank. Inside, you can see the Sea Lions strut their stuff in a performance that lasts about twenty minutes. (Which is a good thing since the stadium-style bench seating can be a little rough on the backside…). Adventurous kids can take part in some pieces of the show.

As for the IMAX, many Bostonians and frequent visitors most associate that kind of big-big-screen presentation with the Museum of Science. The New England Aquarium has an IMAX, too. There's an extra cost to get in (about ten bucks for adults, 8 for kids…) so you may want to even make it a separate trip. But some good shows are there, most of them ocean related (I saw James Cameron's Titanic documentary there…).

If you don't fear sea sickness, you may enjoy heading out to sea to see whales in their natural habitat. The New England Aquarium site says they've been doing Whale Watches since the late 70s. Check the website or call the aquarium for prices and schedules.

And it wouldn't be an aquarium if there weren't a ton of educational programs through which the New England Aquarium staff of experts can spread their love of aquatic life. Programs include a lecture series, presentations at various displays, an education lab right outside the aquarium and programs where the experts go out to schools and organizations. More information can be attained from the website or by calling the NEA.

Shopping amp; Eating.

Of course, you don't want to leave the New England Aquarium without a souvenir. And of course, the NEA is happy to oblige you. There's a gift shop on the ground floor with your typical assortment of aquarium items like stuffed sharks, t-shirts and snowglobes, as well as books and educational toys and games. Outside the aquarium, on the wharf, local merchants operate stalls selling all kinds of Boston memorabilia. And excellent Boston shopping is near by at Quincy Market, needless to say.

There are two cafes attached to the New England Aquarium one inside and one outside. Also outside, vendors sell sausage and hotdogs. You might want to try the very good and diverse food court at Quincy Market.

To contact the New England Aquarium, try their website: www.neaq.org or call 617-973-5200

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