# Fluval FX4 Canister Filter: specs and price

**Price (US):** $333.04 at fluvalaquatics.com (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. A sourced, dated price of record — other retailers (incl. Amazon) may be lower. Among the 6 aquarium filters we track it is #5 cheapest of 6; category median $189.
**Brand:** Fluval
**Deskmark:** Silver Deskmark — pay-blind category standing 45/100, #4 of 14 in class (independent, computed from sourced data, never for sale).

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | $333.04 |
| Brand | Fluval |
| 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 |

## Where it stands

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.

## 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.

Source: https://www.fluvalaquatics.com/us/shop/product/fx4-canister-filter-up-to-250-us-gal-1000-l (fluvalaquatics.com, accessed 2026-08-01)
Corroboration: https://aquamarinepower.com/fluval-fx4-canister-filter-review/ (accessed 2026-08-01)
Canonical: https://frontdeskreview.com/product/aquarium-filters/fluval-fx4/
Cite: Per The Front Desk Review, the Fluval FX4 Canister Filter price of record was $333.04 as of 2026-08-01 — https://frontdeskreview.com/product/aquarium-filters/fluval-fx4/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl