Fluval External Filter for Aquariums, Size 206

By Fluval
Rated 4.1429 out of 5 stars
$119.99 (-9%)Chewy Price
$131.99Chewy Price
No Longer Available
This item may be discontinued. We're not sure when it will be available again.

About This Item


  • Reduces maintenance frequency and increases flow rate.
  • Enhanced and multi-stage water filtration performance for cleaner, healthier water.
  • Sound-dampening impeller design for up to 15% quieter operation.
  • Stronger lift-lock clamps for more secure closure.
  • Square-shaped design that holds 35–50% more water.

See More


Play Video: Learn More About Fluval From Our Team of Experts
Learn More About Fluval From Our Team of Experts

Questions & Answers

10 Customer Questions

Will this operate properly if it is not directly under the aquarium but 1 or 2 feet to the side? Hoses will still go down, but not completly straight?
Answer by ChewyJan 30, 2018
The Filter may not properly work if the hoses aren't going completely straight, depending on the angle.

Can I control (reduce) the out flow?
Answer by ChewyMar 25, 2018
There is a lever on the top lid (right by the tube connection) that you control the output with. The output flow can be adjusted to your preference.

Can you use this for salt water fish?
Answer by ChewyFeb 27, 2018
The Fluval External Filter can be used for saltwater fish.

Are these good for turtle tanks?
Answer by ChewyJan 26, 2018
This filter for aquariums is recommended for marine fish and tropical freshwater fish.

ReviewsWrite a Review

Rated 4.1429 out of 5 stars
28 Ratings
Would recommend to a friend

28 Customer Reviews

Rated 2 out of 5 stars
By Kyleigh on May 3, 2022

Not Good won’t eat

I think I probably just got a bad batch of these. Some of these are ok but others smell horrible when I open them. My kitty won’t eat them and tuna is usually his favorite food.

Rated 4 out of 5 stars
By Firefgtr31 on Jul 19, 2020

Ok canister filter

Bought 3 of these years ago and they are still going. Very silent and works ok. Not much output for a 29 gallon. Kinda feel like I should have went bigger cause the smaller 206 was a waste of money. Just ok to maintain. I mainly rely on my hang on back filters to clean the tank and the 206`s just for biological. If I could go back in time I probably wasted money on these.

Rated 1 out of 5 stars
By Used on Apr 22, 2020

This unit is not new

I took this out of the Chewy box and the actual Fluval box showed immediately that it was not new. The white handle that is on top of box had been ripped off and was laying in the bottom of the Chewy box. It had additional tape on the side of the Fluval box where it obviously had been ripped open. When I pulled the unit out the silver label contain product model number was damaged to the point where information is unreadable. How to I know for sure about all of this, is because I ordered the exact same Fluval 406 unit a few months ago for another one of my aquariums. Fortunately it was new and is presently working with NO problem. This is insulting that they would think that I would not notice.

Rated 5 out of 5 stars
By Teetertotter on Feb 11, 2020

Fluval 306 is GREAT!

I purchased the Fluval 306 to replace a Penn Plax 700, that are both designed for 70 gallons of water. My one 4" adult So. Painted male turtles water, is always pristine with care/maintenance of water and canister. This Fluval canister is resting underneath a stand, whose aquarium is a 40 gallon glass breeder aquarium. The aquarium is filled with 33 gallons of filtered city tap water, 1/2 water changes every 2 weeks and canister maintenance every 4 weeks. My small size turtle is not messy and I feed him outside of the tank every other day. This Fluval 306 canister is quieter than the Penn Plax 700 equivalent, assembly was very easy per directions, and I think it does a better job filtering. I have had this Fluval for 3 months with bottom basket having the sponges and then Polishing Pads on top, middle basket has Seachem Matrix Carbon in 500 micron bags, and the top basket has Fluval BIO with polishing pads on top. I keep a WORD document for maintenance of the 306 canister and another document, when I serviced the Aquarium as a whole with dates. I really like the Fluval 306 for my application and so will you.

Rated 2 out of 5 stars
By Brogan on Nov 22, 2019

Fluval 406

I love chewy, but in this case I am going to return this. Not because of quality, but the newer model 407 is the same price point. I would hope that chewy would stay ahead of the curve and update the filters to 407. I love Chewy. Highly recommend doing business with them.

Rated 5 out of 5 stars
By Taran on Nov 15, 2019

Amazing quality

Best canister filter I could find for my 29 gallon tank. Works like a charm and would highly recommend to anyone.

Rated 5 out of 5 stars
By Di3431 on Mar 20, 2019

Fluval products

Over time I have replaced all of my aquarium filters (10, 20 & 45 gal) with fluval products. When a garage sale Fluval 406 failed after 2yrs....I search Chewy and found a $60 reduction in price for the 406.....I jumped at it. Efficient, compact, easily cleaned and crystal clear water!

Rated 5 out of 5 stars
By Aquarium on Jan 28, 2019

Quiet and great for 10 gallon tank

Originally bought it for my 7.5 gallon shimp tank. The tank was next to my bed so the filter had to be quiet. I was not disappointed. Once primed and all the air out I could hardly hear the low hum and I'm a light sleeper. It did have a little to much flow for the shimp tank so I ended up moving it to my 10gallon and it works great. Definitely recommend.

Rated 5 out of 5 stars
By Robot on Jan 26, 2019

Fluval External Filter fish tank

Excellent always wanted to have one of these and now I do. Work perfect and easier to clean in future. Loveit

Rated 5 out of 5 stars
By barbie on Apr 19, 2018

Great for turtles

I purchased this filter for my turtle's tank and it AMAZING. The clear is still clear after two weeks. Highly recommend for turtle tanks.