Fluval AC20
Manufacturer-rated for 5–20 US gal aquariums.
Fluval AC20 vs Fluval AC50
What changes for you, from the makers' published figures. Neither is "better": the right one is the one that fits your tank and how you look after it.
For a 20 gallon long (example)
Both fit by the makers’ ratings.
- Fluval AC20: Rated for a 20 gal tank.
- Fluval AC50: Rated for a 20 gal tank.
What changes for you
- Tank size: the Fluval AC20 is rated 5–20 US gal, the Fluval AC50 20–50 US gal.
- Flow: Fluval AC20 up to 100 GPH, Fluval AC50 up to 200 GPH.
Next: Fluval AC20: details and fit · Fluval AC50: details and fit · All filters for your tank
Fluval AC20
Fluval AC50
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Fluval AC50
Manufacturer-rated for 20–50 US gal aquariums.
Side by side
| Published figure | Fluval AC20 | Fluval AC50 |
|---|---|---|
| Rated tank size | 5–20 US gal | 20–50 US gal |
| Power | 7 W | 7 W |
| Dimensions | 5.1 × 4.4 × 6.4 in (L × W × H) | 7.2 × 4.4 × 6.4 in (L × W × H) |
| In the box | Bio-Foam, carbon, BIOMAX, intake sponge | Bio-Foam, carbon, BIOMAX, intake sponge |
Figures as published by each maker; see each model’s page for its sources. Open this pair in the full comparison tool →