Fluval FX4 High Performance Canister Aquarium Filter

Absolutely! Hands down the best canister filter out there. If you don't have one and you're waiting, stop, go get it now, you won't regret it. There is no noise. It's easy to install. The flow rate is superb. Water clarity is spectacular. You couldn't ask for anything better. Go get you one! What are you waiting for?

The Fluval FX line of filters is a real work horse which rarely goes wrong if you do the upkeep on it. I use one on the tank I have my turtle in, and it keeps the water crystal clear, even though the old boy digs a lot an tries everything he can to cloud up the water. If I take it off line for cleaning (which is a breeze) or maintenance, it will get the water clear again within an hour if the turtle has been very active while it was off, and much sooner if he wasn't moving around too much. He's a very active turtle, and a very messy eater, but he's neither active enough nor messy enough to overwhelm the FX-6. I also use an FX-6 on my hillstream tank which requires a lot of flow. It pushes the water through at a very good clip so that the stream has a pretty good current for my hillstream loaches and for my rainbow shiners to run in when they're getting ready to spawn. I have the FX-4 on a 20 gallon tank which is probably just a bit overpopulated, But again, it is a good enough filter that it keeps the water quite clean. With surface skimmers on my tanks, even the water's surface is clear. To clean the filter media, all you need to do is lift the media baskets out, the use the filter's bucket to clean the sponges and reusable media, replace the media which has broken down too much to be reused, or which uses chemical treating, then either empty the old water out and replace it with fresh clean, or keep the old water if it's not too bad (it is almost always too bad). The reason you clean the media in the water the filter bucket has in it is so that you don't loose any of the beneficial bacteria which is growing in it. The FX series of filters have variable flow valves, which is a nice feature, though many filters have that. If you close the valves before opening the lid of the filter, you don't have to worry about draining the hoses, and they will be good to go when you turn the filter back on and open the valves. No priming needed. Everything in this filter is easily repairable if something goes wrong. If something happens which wears out the impeller, it's very easy to take the old impeller out, and drop a new one in. It's also easy to replace all the O-rings when they get old and start to loose their ability to seal the unit. If you're unlucky, you might need to do that once a year, but it's more likely that you'll just need put new lubricant on them. I am mechanically challenged, so if I find it easy to take care of, I'm sure just about anyone will be able to do it. I have had problems with several of the other big brands of filter makers, but I have never had a Fluval FX series filter go south on me. I recommend them to anyone who wants to keep their fish's environment clean and healthy. If I ever start another tank, I'll definitely be buying another Fluval FX.

Ive been running the Fluval for about 3 months now, and I am absolutely OBSESSED with its quality. I have a 75 gallon tank with a turtle and pleco (both produce A LOT of waste). Previously I was a die hard Penn Plax Cascade fan for the last 5 years, but my last two had motor failures and they changed their warranty terms finally, so I decided to switch it up. Long ago I wanted a Fluval, but but the price was steep so I settled for less and let me just say it’s the best investment you can make. It’s quiet (don’t know why other reviews say it’s not unless they are keeping their water levels really low), my tank remains crystal clear with my normal monthly maintenance routine, and it is easy to clean and change out my media. The fasteners are really not that complicated and don’t take that long to unlock like other reviews say. The canister itself is designed so that it is air tight and I’ve had no signs of leaking. The outtake is made so you have two options to direct the flow of your water which is helpful if you have a basking platform above half of your tank. Highly recommend.

I have two turtles and their tank was always so dirty! I have gone through 6 HOB filters and two aesthetic turtle filters (ones that look like rocks) and every filter I tried needed to be fully taken apart and deep cleaned every few weeks! Nothing could keep my tank clean until I got this filter! I waited a few months to write this review just to make sure it held up and it is still absolutely amazing! I was nervous because I have never had a canister filter before and I didn’t know how to use it but it’s actually incredibly easy. It’s effective, super quiet, and total game changer for my turtles! Now I’m thinking of switching all of my tanks to this filter! It saves me so much time and it saves money because I don’t need to constantly buy replacements for the HOB filters anymore!

You can’t beat this Product really a powerhouse of a pump. Using this on a 75gal Reef Tank. I tried a sump just could never get it adjusted correctly. My water is crystal clear

*UPDATE* Instead of giving advice or suggestions, Fluval customer service decided to blame me and my light sources aka natural light. I told them multiple times that my turtle tank isn't near natural light and that I never had a problem with other filters with heated lamps. I even cleaned out the filter and the tank AGAIN without light and still algae. It also GOT GREENER!!! My poor turtle is stuck in a smaller tank till I can purchase a new filter or until I can figure out the problem myself. Then the customer service rep flat out told me their filters aren't meant for turtles 😐. I have had this filter for a little over a month now (close to two) and I am extremely disappointed! This filter has not cleaned a thing! Then the water started to become super green! I cleaned out the filter as well as the media and noticed algae all in the filter. I added new media hoping to clean the water a bit better AND YET algae is still growing. So (as shown in the second picture) and completely cleaned the tank and emptied out all the gravel. I completely cleaned out the water and added fresh water the old fashion way and still GREEN WATER! This filter has caused me nothing but trouble and my poor turtle has to stay in a small tank (because I couldn't afford a bigger one for him to temporarily stay in) until I figure this out. And no, algae removers/reducers aren't helping! A $300+ canister filter and it has not cleaned crap!

I have had other Fluval pumps, the build quality of the FX series is significantly better. The self prime function is fantastic and worth the money just for it. No more pumping to get the pump to flow.

Très bon filtre, utilisé pour 2 tortues d'eau, le bruit est résonnable, l'eau reste clair et très propre, le débit est correcte. Le montage est vraiment facile, tout est expliquer en français et detailler avec des illustrations. Pour le nettoyage, rien de plus simple, on peut brancher un tuyau sur la sortie vidange pour vider le contenu et il peut se remplir avec l'eau de l'aquarium, franchement c'est super pratique. La pompe, toute les 12h chasse l'air contenu dans la pompe, tout est automatique, même l'amorçage ! On le branche et ça démarre. Pour l'instant aucune fuite, tout fonctionne très bien , livrer avec des joints en supplément. C'est peut être un peut cher mais côté pratique et gain de temps et performance, je ne regrette rien.

Fluval FX6 ha risolto i mimei problemi di poca dimensione del filtro nell'acquario. Acqua pulita, cristallina e niente più alghe. Le vecchie stanno sparendo e il fondo non ha più residui. Potente e silenzioso. Comodamente riposto nei vani di un Juwel Rio 450 (o Vision 450). Comodo da pulire. Qualche adattamento da fare nella parte superiore dell'acquario (lo ho preferito a fare fori nel vetro). I tubi possono (devono) essere migliorati come estetica e qualità del tubo da parte del produttore, sono grandi, ma gli attacchi rapidi sono ottimi e dotati dei rubinetti di chiusura e apertura. Nulla che dire ottimo investimento. La pulizia del filtro è facile, finalmente niente bagnato o stracci ovunque. Speriamo duri nel tempo.

This filter is superb. I have it running on a Fluval Roma 240 tank. Which originally came with the Fluval 306. A good filter in its own right, but this is the next level. It’s really easy to maintain and due to its size and filtration ability I only clean mine out once very 5-6 months, where as with the 306, this I had to clean almost weekly. The intake and output can both be independently adjusted, so you can reduce the flow if it’s really stirring up your tank. It came with filter media and having had this running for well over 5 years now, I still have the original media in place and have no need to replace it any time soon. Mine came with a free gravel vac, although this was more of a novelty than a bonus. I just use a normal gravel vac as part of my water changes so the one included isn’t of any use as the water stays within the system. After years of constantly being on, it has been faultless but quiet it is not. There is a continuous humming noise coming from it and if the tank was in a bedroom you would not want the filter running. Keep this in mind before you buy as it is not silent. Our tank is in the living room and the filter sits in a cabinet, but it’s still quite loud, butit doesn’t bother us, however if it we’re silent running it would be an amazing and faultless filter. It includes a small tap that allows you to drain out water direct from the filter, this makes water changes incredibly easy. However, if you’re filling the tank back up you need to ensure it’s dechlorinated water so as not to harm the fish or filter bacteria. Other than the noise, I really can’t complain about the filter at all and would highly recommend it. If you cover your filter Inlet with pond filter sponge, you can protect fish and shrimp from being sucked in and prolong the gap between cleaning the filter out. Which is what I do and it works wonders.

Şu ana kadar aldığım en iyi dış filtre parasını hak ediyor

Great filters. I have 3 FX6s and 1 FX4. They run great and do not need much maintenance at all ADVISE: These are expensive so make the most of them! - Get a prefilter (this will make you only having to clean the filter every 6 months. or even more = Less openings and longer life of filter) - Get Food Grade lubricants for the O-Rings. Apply every time you open the filter! Important to avoid leaks! - Clean the impellor once a year. The output gets a lot better and extends filter life - Do not change the sponges. Only clean the sponges. Changing the sponges and media is only good for Fluval profits but contra productive for the biological filter. (Sorry fluval but the truth) Sponges last for years. Seriously. Also load the filter up with only sponges or pot scrubbies. Ceramical rings are sub optimal.