Fluval C2
Manufacturer-rated for aquariums up to 30 US gal; published maximum rim thickness is 1 inch.
Fluval C2 vs Fluval AC20
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 C2: Rated for a 20 gal tank.
- Fluval AC20: Rated for a 20 gal tank.
What changes for you
- Tank size: the Fluval C2 is rated up to 30 US gal, the Fluval AC20 5–20 US gal.
- Flow: Fluval C2 up to 119 GPH, Fluval AC20 up to 100 GPH.
- Power: 5 W against 7 W, which changes the running cost.
Next: Fluval C2: details and fit · Fluval AC20: details and fit · All filters for your tank
Fluval C2
Fluval AC20
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Fluval AC20
Manufacturer-rated for 5–20 US gal aquariums.
Side by side
| Published figure | Fluval C2 | Fluval AC20 |
|---|---|---|
| Rated tank size | Up to 30 US gal | 5–20 US gal |
| Flow through the filter | 119 GPH | Not published |
| Power | 5 W | 7 W |
| Dimensions | 6 × 4.7 × 6.7 in (L × W × H) | 5.1 × 4.4 × 6.4 in (L × W × H) |
| In the box | poly/foam pad, activated carbon, BIOMAX, Bio-Screen pad | 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 →