Fluval · Updated August 2026
Fluval FX4 Canister Filter: price & specs
Fluval FX4 Canister Filter. Every price and spec below is linked to its source and dated — no guesses.
Source: fluvalaquatics.com verified ✓ corroborated verify in ledger
The Fluval FX4 Canister Filter is listed at $333.04 on fluvalaquatics.com as of 2026-08-01, #5 cheapest of 6 aquarium filters (median $189); other retailers may be lower. It earns a Silver Deskmark — 45/100 pay-blind standing, #4 of 14 in class.
Verified Aug 1, 2026 · figures linked to their source in the table below
Cheapest aquarium filters: AquaClear 70 Power Filter — $79.99
Is the Fluval FX4 Canister Filter a good buy?
At $333, the Fluval FX4 Canister Filter is #5 cheapest of the 6 aquarium filters we track, where the median is $189. On the spec sheet, its media stages of 3 is the lowest of the 9, its flow rate gph of 700 is above the median of the 14, and its tank size gal of 250 is above the median of the 14.
Specifications
| Price (US) | $333.04 Aquarium Source's dedicated FX4 review cites $333.04 at the retailer it checked; a separate Aquarium Source "best canister filter" roundup cites $331.99 at another retailer around the same time. Fluval's own product page does not publish a price. |
|---|---|
| Brand | Fluval |
| Released | — |
| Type | canister |
| Flow rate gph | 700 |
| Tank size gal | 250 |
| Media capacity (L) | 3.9 |
| Media stages | 3 |
| Wattage | 30 |
| Self priming | Yes |
| Dimensions (in) | 15.75 x 15.75 x 16.5 |
Source: fluvalaquatics.com (verified 2026-08-01) · corroborated by aquamarinepower.com. Fluval's official US product page states verbatim: pump output "700 US GPH / 2650 LPH", filter circulation "450 US GPH / 1700 LPH", tank size "up to 250 US gallons (1000 L)", media basket capacity "1 gallon (3.9 L)", multi-stage mechanical/chemical/biological media, power "30W (120V/60Hz)", Smart Pump self-starting operation, and dimensions "15.75in L x 15.75in W x 16.5in H" — used directly for every spec field. Aquamarine Power's independent review corroborates 700 GPH, "up to 250 gallons", "30 watts", "1 gallon (3.9 liters)" media capacity, self-priming ("Yes (automatic)"), and "4 removable baskets", plus measured 28dB noise and a $350-400 street-price range not used here since the two Aquarium Source figures are more specific. No verbatim USD MSRP appears on Fluval's own page.
Is the Fluval FX4 Canister Filter worth it vs cheaper aquarium filters?
Fluval FX4 Canister Filter against its closest cheaper and pricier aquarium filters on the specs that matter — every value sourced. See all 6 ranked
| Product | Price | Type | Flow rate gph | Tank size gal | Media capacity (L) | Media stages |
|---|---|---|---|---|---|---|
| Fluval FX4 Canister Filter this | $333.04 | canister | 700 | 250 | 3.9 | 3 |
| Fluval 307 Performance Canister Filter | $199.99 | canister | 303 | 70 | 3.1 | — |
| Fluval FX6 Canister Filter | $369.99 | canister | 925 | 400 | 5.9 | 3 |
Frequently asked questions
How much does the Fluval FX4 Canister Filter cost?
The Fluval FX4 Canister Filter has a US price of $333.04 (Aquarium Source's dedicated FX4 review cites $333.04 at the retailer it checked; a separate Aquarium Source "best canister filter" roundup cites $331.99 at another retailer around the same time. Fluval's own product page does not publish a price.), as of 2026-08-01.
How does the Fluval FX4 Canister Filter compare on price?
At $333, the Fluval FX4 Canister Filter is #5 cheapest of the 6 aquarium filters we track, where the median is $189.
What are the Fluval FX4 Canister Filter's key specs?
Fluval FX4 Canister Filter (Fluval): type canister, flow rate gph 700, tank size gal 250, media capacity l 3.9, media stages 3. Full sourced spec sheet verified 2026-08-01.
Price of record: $333.04 at fluvalaquatics.com, 2026-08-01. Other retailers may be lower — check the current price:
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