Fluval FX4 External Filter, 1000 Litre

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.

I purchased this filter for use with my daughters Christmas present a 250 litre fish tank. The main reason I purchased this was because it helps with water changes. My daughter is 12 and I didn't want her interest in fish keeping to become a chore. It hasn't. With the turn of two valves the filter will empty water out of the tank. And with the addition of a length of hose and a nearby downstairs toilet and the smart use of some Hozelock dual control valves the entire process of emptying and filling is now done without buckets. There is in my opinion some serious downside with this filter. It doesn't come with anywhere near enough medium. However, if you're prepared to invest in a seriously great media product I'd recommend Biohome Ultimate. I've added a canister filter to the in-line side of the filter. This is simply a mechanical filter. I've removed the mechanical filters from the bottom of the FX4 and used the entire bottom of the filter to house 3kg of Biohome. And I now have nitrates that appear at between 1 & 3ppm. Apart from that sadly missed opportunity by Fluval this is an excellent filter. It's robust and sturdy. It's quiet. If you want to understand how to "pimp" this filter I'd suggest you go to You Tube and search for "pimp my filter" by Pond Guru. I've no affiliation with Fluval, Biohome or Pond Guru. I don't leave many reviews on Amazon. I genuinely hope this is one that offers some help for others.

Good product, good price and fast delivery.

Brilliant bit of kit, highly recommended

This thing is awsome .... I bought the all pond solutions 1000ef with the booster about 6 months ago. Works fine but I wanted more filtration but couldn't afford one of these fx4 then I finally bought it !! I'm telling you now the flow rate on this thing is brilliant puts my pond solutions to shame.. just be careful when you chop the pipe in half make sure you measure to your tank size apart from that when I plugged it in it instantly primed itself !! Then the power is amazing without doubt this is well worth the money. It isn't noisy at all dont listen to other reviews the is quiet powerful and definitely worth it

Over all happy with it. Was struggling with the bubble problem (appears to be a common Google search) but I simply swapped the output flow to the longer tube and the intake was on a shorter pipe. The bubbles come from the pump being a quicker at pumping out than sucking in. Nice and compact design. Good price. Flow is great (almost to high) for a 200ltr tank,but fixed it by attaching a spray bar (recommended as supplied Split outputs are too strong for most tanks. I also watched pimp my filter about changing sponges for a normal set up as what Is supplied won't offer the correct amount you need.

Had this filter running my tank for over 6 months as a replacement for an All-ponds-Solutions filter that wouldn't stop leaking from the head when turned off . The FX4 certainly the one you need if; A) You have a larger tank i.e. 300 litres+ and/or B) Have a number of large/messy fish. I have the FX4 running alongside an FX6 on the same tank to provide the turnover of water that my tank needs due to types of fish I keep. I've never had any real issue with the filter other than it sometimes creating micro-bubbles sometimes but I think this has been more down to my cleaning schedule than due to a issue with the filter itself. As after cleaning the soiled sponges it seems to have stopped. The Auto air purging feature of this filter is also very helpful as this prevents you having to do this yourself, this I believe also helps the filter to stay quieter as prevents air turbulence noise as it goes through the impeller. Good: -High flow -Good Media Capacity -Easy to clean -Quiet -Has slimmer outlet nozzles compared to FX6 Bad: -Can sometimes go through phases of creating micro-bubbles -Can be a bit of a bugger to prime upon first setup -Doesn't come with choice of large or slim outlet nozzles

Bit the bullet and finally got a Fluval FX4 for my 600ltr tank. Was fed up to the back teeth with All Pond Solutions equipment. I spent more time taking out the other external filter then putting the FX4 in! Literally 15 minutes to get it up and running. Then when the self primming kicked in it was like a dream!! Its almost silent running and the fish are loving the new tank flow. I did buy some ATM active carbon to put in as an extra media and after 3 hours the difference is unbelievable!! Its not a cheap filter but you get what you pay for and this filter is just brilliant and recommend it to anyone with a big tank like mine.

Şu ana kadar aldığım en iyi dış filtre parasını hak ediyor

Super Filter, reinigt sehr gut das Wasser. Einfach zum reinigen und wasserwechsel natürlich super easy

Zeer snel geleverd tegen de laagste prijs. Het is een beest van een filter met een zeer grote netto capaciteit. Ben er zeer tevreden mee. Het is een geluidsarme filter die zeer onderhoudsvriendelijk is. Door de degelijke bouw en kwalitatieve accessoires is het een genot om hem aan te sluiten en in gebruik te hebben.

ممتاز وكل شي تمام وتمشي مع كهربة السعودية والفيش جيبوله راس ينحل موضوعه بس الغطا يعل بتقفيلته لانه لف مسامير اقل غلطة تسريب

I bought this filter after my old one gave up. I gotta say, this was one worthy investment. It’s great! Easy to assemble and clean. The valves are positioned great. Noise is minimal and suction power is good, keeps my tank clean at all times. Never had an issue since installation. Highly recommended for large fish tanks (I have a 90 gallon tank)