Fluval FX4 vs 407

Fluval FX4 vs 407 is going to be a pretty weight match up. Especially since, Fluval FX4 is straight up a beast of a machine compared to its sibling Fluval 407. But then again, the price difference plays a big part as well. Is worth it to go for Fluval FX4 even with the extra cost? Or is an overkill? Let’s find out.

Fluval FX4

For those of you who don’t know, Fluval is famous for their high-quality products and Fluval FX4 is the real proof of it. See also: Fluval FX6 vs G6.

There is a lot to know about this product and it’s going to be a long read for you. Fluval FX4 comes with plenty of features. It will take you a while to unpack everything, so here goes:

  • Smart Pump. It auto-evacuates air and makes sure it’s always running as efficiently as possible.
  • 2 stackable Baskets.
  • Mechanical, biological and chemical filter media.
  • Leak-proof valves.
  • Anti-clog telescopic strainer.
  • Multi-directional output nozzles, which are great for helping you control the flow rate.
  • Utility valve and drain hose.
  • Rubberized feet.
  • A connection port that allows you to easily attach the Fluval Fx Gravel Vac.

The self-primer is probably the best feature that Fluval FX4 has. It will take care of things for you. You only need to fill it up with water before you turn it on and that’s it. The machine can take care of itself.

If you want to be careful, you can keep notes when the pump needs to readjust itself, usually every 12 hours. It’s going to be really loud, so don’t be surprised when that happens. The whole process takes 2 minutes.

Next, let’s see if all these features are what you actually need. Fluval FX4 is able to pump 700 US Gal (2650 L) of water per hour. For an aquarium owner, you’d want the filter to be able to circulate water at four times the amount of water in the aquarium.

And if you own a small aquarium and think this is overkill, you can slow the flow rate and also you should know that the increased circulation in your tank will only help make it cleaner.

If you decide to make it slower than you can do so easily. If you’re planning to put this in a smaller tank (don’t go smaller than 50 gallons, since it would be too small) or because you have fish like bettas or something, then you might want to decrease the flow rate.

The easiest way to do this is by adjusting the angle of the output nozzles, so they’re flowing into glass instead of directly into water.

It slows down the flow rate quite a bit. Simple solution and effective too. No need to pay extra money. Also, an easy solution is, closing the output valve slightly.

This way you can reduce the water flow from the filter and into your tank. But remember, closing the output valve too much could damage the inside of your canister filter over time.

Another solution is by adding filter sponge to the output nozzles. If you like DIY projects then you’ll like this one. don’t worry, it’s not too difficult, just find some filter sponge that’s big enough to fit around the nozzles and cut a hole in it. The hole will now act like a nozzle and limit the flow rate.

Last but not least, adding a spray bar. This is probably the best solution and is also very affordable if you make one yourself. A spray bar will disturb the flow, turning one strong current into multiple weaker currents. Like we said before, you make one yourself if you’re crafty enough.

We know that a lot of people are probably still thinking “is Fluval FX4, overkill?”. We’re going to add one more thing to help you decide on that one. Fluval FX4 is suitable for aquariums up to 200 gallons in size and can work on aquariums as small as 50 gallons, assuming you have the right types of fish.

For example, bettas don’t like strong flow, so if you have bettas in a 50-gallon aquarium, Fluval FX4 needs to be adjusted using methods we described above.

Fluval 407

It might be difficult to make Fluval 407 stands out after describing the more powerful Fluval FX4. But Fluval 407 can hold its ground and with the cheaper price tag, it’s worth to be talked about.

Unlike Fluval FX4, Fluval 407 is working at weaker power. It’s designed to work for 500 L or 100 gallons aquariums. So, for people who own a small aquarium, you can make Fluval 407 works without the need to readjusting the waterflow.

Fluval 407 comes with a lot of parts to assemble, complete with all the media you need to run your canister for free of course.

The whole design is ergonomic and easy to work with. Pretty much all the parts and maintenance are very easy and effortless. Fluval 407 also guaranteed to last for a very long time.

The most impressive thing about Fluval 407 is that, it only needs 10 Watts of power or the same as single LED bulb. And we talked about how Fluval FX4 can be really loud, Fluval 407 is the complete opposite.

Fluval 407 is 25% quieter than the previous generations or namely the 06 series. It has better parts on the inside that make this possible.

Fluval FX4 vs 407

- Multi-stage filter pumps out 700 US Gal (2650 L) of water per hour
- Smart Pump advanced microchip technology continuously monitors and optimizes pump performance
- Self-starting – just add water, plug in and Smart Pump will take over. Trapped air auto-evacuated every 12 hours to ensure maximum efficiency
- Ergonomic design and raised lip for smoother operation
- Single action dual locking clamps for quick release & attachment
- New center handle allows Main media stack to be removed


Two different pumps with different purpose. Fluval FX4 has the advantage of being more powerful and sophisticated but for people with smaller aquariums, there are some adjustments to be made. Fluval 407 on the other hand, can be used as is, with no fuss or fear of breaking it.

While Fluval 407 is not as smart as Fluval FX4, it’s very durable and works wonderfully. Fluval 407 gets a bonus point for being cheaper and efficient and Fluval FX4 gets a bonus point for being fully automatic and powerful. It all comes down to what type of user you are. Fluval FX4 will satisfy enthusiasts with big aquariums, and Fluval 407 will be suitable for home users with small aquariums.