Fluval AC50
Manufacturer-rated for 20–50 US gal aquariums.
Fluval AC50 vs Seachem Tidal 55
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 AC50: Rated for a 20 gal tank.
- Seachem Tidal 55: Rated for a 20 gal tank.
What changes for you
- Tank size: the Fluval AC50 is rated 20–50 US gal, the Seachem Tidal 55 up to 55 US gal.
- Flow: Fluval AC50 up to 200 GPH, Seachem Tidal 55 up to 250 GPH.
- Power: 7 W against 6 W, which changes the running cost.
- Size: Fluval AC50 6.4 in tall, Seachem Tidal 55 8.375 in tall.
Next: Fluval AC50: details and fit · Seachem Tidal 55: details and fit · All filters for your tank
Fluval AC50
Seachem Tidal 55
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Seachem Tidal 55
Manufacturer-rated for aquariums up to 55 US gal; needs 3 in wall clearance and fits trim up to 1 in.
Side by side
| Published figure | Fluval AC50 | Seachem Tidal 55 |
|---|---|---|
| Rated tank size | 20–50 US gal | Up to 55 US gal |
| Power | 7 W | 6 W |
| Dimensions | 7.2 × 4.4 × 6.4 in (L × W × H) | 8.0625 × 6.125 × 8.375 in (L × W × H) |
| In the box | Bio-Foam, carbon, BIOMAX, intake sponge | heater holder, telescoping intake pipe, leveling dial, foam filter, Matrix bio-media, instruction manual |
Figures as published by each maker; see each model’s page for its sources. Open this pair in the full comparison tool →