Fluval 307 Review
Our Fluval 307 review covers its 70-gallon rating, included media, quiet eTEC pump, owner feedback, and the conflicting listing specs to check before buying.
Updated October 24, 2026
The Fluval 307 is the mid-size canister in Fluval’s 07 series, and its Amazon listing rates it for freshwater and marine aquariums up to 70 gallons. It makes the most sense on a 40 to 70 gallon tank, which covers the common 40-gallon breeder and 55-gallon setups, when you want the filter out of sight in the stand and the listing describes the pump as quieter than previous generations. It is the wrong size for tanks under about 30 gallons or over 70, and its listing carries several conflicting specs that you should sort out before you order.
Our assessment draws on the full Amazon listing (feature bullets, specification table, included components, and description) and the owner reviews posted on it. Fluval’s own product pages for the 07 series blocked our requests, and we did not find a 07 series manual on Fluval’s website, so every figure about the 307 below is per the listing. Where the listing contradicts itself, we say so rather than pick a number.
This review is general product information, not repair or electrical safety advice. Follow the safety instructions in your product’s manual, supervise children, and contact the manufacturer or an authorized service center if a product sparks, overheats, or has a damaged cord.
We earn a commission from qualifying purchases made through links on this page. Commissions never affect our rankings or AquariumTech Scores.
Fluval 307 Performance Canister Filter
As an Amazon Associate we earn from qualifying purchases.
Fluval 307 at a Glance
Every value in this table comes from the Amazon listing for the Fluval 307 Performance Canister Filter (model A446).
| Spec | Fluval 307 (per the listing) |
|---|---|
| Rated aquarium size | Up to 70 gallons, freshwater or marine |
| Maximum flow rate | 1,150 liters per hour (about 304 US gallons per hour) |
| Power figure | 16 watts |
| Pump | eTEC, described as using about the same energy as an LED light bulb |
| Mechanical stage | Vertical pre-filter cartridge with its own access |
| Media access | EZ-Lift media baskets with a center handle |
| Weight | Not confirmed (the listing gives 6 pounds and 9.8 pounds) |
| Dimensions | Not confirmed (the listing gives two different sets) |
| Voltage | The listing shows 220 volts, which conflicts with US sale (check the label) |
| Warranty | Not stated (the listing refers buyers to the maker’s website) |
Where the 307 Listing Disagrees With Itself
Voltage: the specification table shows 220 volts, which conflicts with Amazon.com selling it in the US. The voltage field is not consistent across this product line on Amazon either: the 207 listing shows 240 volts and the 407 listing shows 230 volts. We read that as a field you cannot rely on, in either direction. When the filter arrives, read the rating label on the unit and compare it with your outlet. If the two do not match, do not plug it in; contact the seller or Fluval.
Dimensions: Not confirmed. The listing’s dimension fields conflict, so measure the unit when it arrives and leave room above it to lift the basket stack out.
Weight: the item weight field says 6 pounds, while the style field on the same page reads “9.8 LB.” Neither is labeled as the shipping weight, so we treat the weight as unconfirmed.
Shared ratings: the 307 listing shows exactly the same rating and rating count as the listings for the 107, 207, and 407, and the reviews on it name several of those sizes. Because the ratings appear to be pooled across the line and the voltage field conflicts with Amazon.com selling it in the US, we lowered its AquariumTech Score by an editorial adjustment, as described on our How We Review page. In the owner section, we only use reviews that do not name a different size.
Who the Fluval 307 Canister Filter Is For
- Tanks of roughly 40 to 70 gallons: a 40-gallon breeder or a standard 55-gallon tank sits inside the listed rating with room to spare, which matters if you keep messy fish or feed heavily.
- Marine and freshwater keepers: the feature bullets describe the 307 as designed for freshwater and marine tanks up to 70 gallons.
- Tanks in shared rooms: the listing says the pump runs up to 25% quieter than previous generations, and owners on this listing, some of whom may own other sizes, describe it as hard to hear.
- Keepers who clean filters often: per the listing, the media stack lifts out by a center handle without emptying the canister of water, and the pre-filter has separate access.
Strengths
- A flow figure that fits the size class: 1,150 liters per hour is about 304 gallons per hour, or about 4.3 times the volume of a 70-gallon tank each hour, by our math from the listed maximum.
- Listed low power draw: the specification table gives 16 watts, and the listing compares the eTEC pump’s energy use to an LED bulb.
- Two-stage access for cleaning: the vertical pre-filter cartridge and the EZ-Lift basket stack are described as separately accessible, so the mechanical stage can be rinsed without lifting all of the media.
- A full parts list: the included components cover hosing, valve, intake parts, output nozzle, and several Fluval media, so the listing covers the basic parts.
- Quiet in owner accounts: several reviewers on this listing who did not name a size say they barely hear it.
Drawbacks
- Conflicting specs: voltage, dimensions, and weight all need checking against the unit itself.
- Pooled ratings: the listing’s ratings appear to cover four sizes, so they tell you less about the 307 than they seem to.
- No stated warranty length: the listing only points to the maker’s website.
- Replacement media adds up: one owner notes that the number of media pieces makes regular replacement more expensive.
- One owner reported different media: they received carbon pouches about half the size they expected and media that did not look like standard Fluval media.
What Owners Say
The reviews on this listing mix several sizes: some name the 107, 207, or 407. We set those aside. The points below come from reviews that do not name a size, so some of these owners may still be running a different model from the line.
Clear water and near-silent running come up again and again. One owner put the filter on a 55-gallon tank, called setup very easy, and said the fish like the strong current. Another said the water stays clean and the filter is very quiet, and that with so many media pieces the media is a bit more expensive to change regularly, but well worth it. A first-time canister owner with a heavily planted 29-gallon tank said they never hear it, but bought a Fluval spray bar because the standard output nozzle kept pushing floating plants around no matter how they aimed it.
The most useful caution came from a reviewer who was pleased overall, found setup easy, and called the noise non-existent, yet said the media in the box was not what they were used to from Fluval: the carbon pouches were half the size of the pouch they ordered for this unit, and the filters looked like aftermarket parts, in their opinion. They swapped in spare media they had on hand. If you order, compare the contents with the listing’s parts list before you set the filter up.
Fluval 307 Filter Media: What the Listing Includes
The listing says the filter ships with authentic Fluval media, and its included components name these media and media parts:
- Bio-Foam Max, Bio-Foam, and Bio-Foam+
- Carbon, 2.46 oz (70 g)
- Quick-Clear
- A pre-filter basket, a media basket, a media basket cover, and a media basket handle
The listing does not say which media sits in which basket or how often each piece should be replaced, so keep the instruction manual that comes in the box and follow its service schedule. Two practical points follow from the owner reviews above: media replacement is an ongoing cost with this design, and it is worth checking that the media in your box looks like the Fluval media on the listing. If you plan to swap in your own media later, our filter media roundup compares options by type.
Sizing the 307 for Your Tank
The 07 series steps up by tank size. Flow figures below are each listing’s maximum flow rate, converted to US gallons per hour; the 107 entry comes from its listing title only, because we do not have its full listing.
| Model | Rated for (listing) | Listed maximum flow |
|---|---|---|
| Fluval 107 | Up to 30 gallons | Not confirmed |
| Fluval 207 | Up to 45 gallons | 780 L/h (about 206 GPH) |
| Fluval 307 | Up to 70 gallons | 1,150 L/h (about 304 GPH) |
| Fluval 407 | Up to 100 gallons | 1,450 L/h (about 383 GPH) |
The listing gives a maximum flow rate and does not say whether it was measured with media loaded or with hoses running up to the tank, so flow in a working setup may be lower. Use the tank rating first and the flow figure second. Some worked examples:
- 29 gallon planted tank: the tank is well under half of the 307’s rating, and the reviewer on this listing with a 29-gallon planted tank, who did not name a size, added a spray bar to calm the output. The smaller Fluval 207 is rated closer to this size.
- 40 gallon breeder: inside the 207’s 45-gallon rating, but near its top. The 307 gives more headroom for a heavy bioload.
- 55 gallon community tank: the most natural fit. The tank sits well inside the 70-gallon rating, and the listed maximum works out to about 5.5 times the tank volume per hour.
- 75 gallon tank: past the 307’s rating. Step up to the 407, which is rated for up to 100 gallons per its listing.
If you are still comparing brands for a 55-gallon tank, our roundup of canister filters for 55 gallon tanks lines up the options by rating and media capacity.
Fluval 307 Setup: Before You Plug It In
We do not give step-by-step setup instructions here, because we have no maker manual for the 07 series to summarize, and the listing does not describe priming. The instruction manual in the box is the source to follow. What we can offer is a checklist for the day the box arrives, built from the listing’s parts list and the issues above, so you can set up the 307 without surprises.
- Parts: lay everything out against the listing’s list: AquaStop valve, ribbed hosing, rim connectors, intake tube, intake stem with strainer, output nozzle, rubber hose connectors, a suction cup, and the instruction manual.
- Cabinet space: measure the unit itself, because the listing gives two sets of dimensions, and leave room above it to lift the basket stack out by its handle.
- Hose route: plan where the intake and return will sit on the tank rim before you cut any hosing, and keep the full length until the canister is in its final spot.
- Output direction: if your tank has floating plants or slow swimmers, plan how you will soften the return, since one reviewer on this listing needed a spray bar.
- Electrical safety: read the rating label before plugging in. If it does not match your outlet, or the unit or cord arrives damaged, do not use the filter, and contact the seller or Fluval.
How It Compares
Fluval 307 vs 207: the 207 is rated for up to 45 gallons and lists 780 liters per hour and 10 watts, against 70 gallons, 1,150 liters per hour, and 16 watts for the 307. Its listing gives a housing height of 11.5 inches; the 307 listing’s dimensions conflict, so measure before assuming either size fits your cabinet. For tanks up to the 207’s listed 45 gallons with light stocking, the 207 is the closer match; for anything from about 45 to 70 gallons, choose the 307.
Fluval 307 vs 407: the 407 is rated for up to 100 gallons and lists 1,450 liters per hour. On a 55-gallon tank, both cover the tank; the 407 adds headroom. For a closer look at the larger size, including its own listing problems, see our Fluval 407 review, and the side-by-side comparison of the 307 and 407 covers the trade-off in detail.
Fluval 307 vs Penn-Plax Cascade 1000: the Cascade 1000 listing gives 265 GPH, a rating of up to 100 gallons, 110 volts, and 12 pounds. The Fluval lists the higher flow and the separate pre-filter; the Cascade lists a US voltage and a higher tank rating. If a 110-volt listing matters more to you than the Fluval’s pre-filter design, the Penn-Plax canister is worth a look.
For other canister filters, and for hang-on-back and internal designs, browse our aquarium filter section.
Who Should Look Elsewhere
- Owners of tanks over 70 gallons: that is past the listing’s rating; the 407 or a larger canister fits better.
- Owners of tanks under about 30 gallons: the 107 or 207 is rated closer to the tank, with less current to tame.
- Buyers who want every spec confirmed before ordering: voltage, weight, dimensions, and warranty are all unclear on this listing.
- Keepers who want low running costs: the multi-piece media set means more parts to replace over time, per one owner.
- Buyers who rely on ratings for one exact model: this listing’s ratings appear to be shared across the 07 series.
Why You Should Trust Us
We do not conduct our own product trials; this review rests on the Amazon listing, the other 07 series listings, and owner reviews on this listing, and the AquariumTech Score is set by the published method. For this review, that meant reading the full listing, comparing it with the listings for the other 07 series sizes, and separating owner reviews by the model they describe. Commissions do not change the score or the verdict.
Final Verdict
The Fluval 307 is a sensible size for tanks of roughly 40 to 70 gallons, and the 55-gallon tank is where it fits best. Per the listing, it brings a quiet eTEC pump, a separate pre-filter, lift-out baskets, and a full media set. The listing itself is the weak point: the voltage, weight, and dimensions conflict, the warranty is unstated, and the ratings appear to be shared with three other sizes. Buy it with a plan to check the rating label and box contents on arrival; if your tank is over 70 gallons, move up to the 407.
Frequently Asked Questions
How do you clean a Fluval 307 filter?
Follow the service steps in the instruction manual that ships with the filter, including its electrical precautions. Per the listing, the EZ-Lift basket stack lifts out by its center handle without emptying the canister of water, and the vertical pre-filter has its own access, so the mechanical stage can be serviced on its own. For general habits that apply to any filter, see our guide to cleaning an aquarium filter.
What size tank is the Fluval 307 canister filter for?
The listing rates it for aquariums up to 70 gallons. It suits tanks of roughly 40 to 70 gallons; below about 30 gallons, the 107 or 207 is a closer match, and above 70 gallons, the 407 is the next size.
What filter media comes with the Fluval 307?
Per the listing: Bio-Foam Max, Bio-Foam, Bio-Foam+, carbon (2.46 oz), and Quick-Clear, plus a pre-filter basket and media basket. One owner found smaller carbon pouches than expected, so check the contents when the box arrives.
Can the Fluval 307 be used on a saltwater tank?
The listing describes the Fluval 307 filter as designed for freshwater and marine tanks up to 70 gallons. It does not say which media to use in a marine tank, so check the manual before you set it up that way.
Is the Fluval 307 good for a 55 gallon tank?
Yes, on paper it is the best-matched size in the line for a 55-gallon tank: the tank sits well inside the 70-gallon rating. One owner on this listing, who did not name a size, runs a filter from it on a 55-gallon tank and reports clear water and an easy setup.
About the author
Soham James is a fishkeeping enthusiast with a keen interest in aquarium technology and equipment selection. At AquariumTechLab.com, Soham explains filters, heaters, pumps, and monitoring tools, helping aquarists understand their options and choose equipment suited to their tanks.