Fluval M50
Manufacturer-rated for aquariums up to 15 US gal.
Fluval M50 vs Fluval M100
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)
Only the Fluval M100 fits by its maker’s rating.
- Fluval M50: Rated up to 15 gal, not 20 gal.
- Fluval M100: Rated for a 20 gal tank.
What changes for you
- Tank size: the Fluval M50 is rated up to 15 US gal, the Fluval M100 up to 30 US gal.
- Power: 50 W against 100 W. More watts heats more water or a bigger rise above room temperature; check the maker's chart for your room.
Next: Fluval M50: details and fit · Fluval M100: details and fit · All heaters for your tank
Fluval M50
Fluval M100
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Fluval M100
Manufacturer-rated for aquariums up to 30 US gal.
Side by side
| Published figure | Fluval M50 | Fluval M100 |
|---|---|---|
| Rated tank size | Up to 15 US gal | Up to 30 US gal |
| Power | 50 W | 100 W |
| Dimensions | 11 × 1 × 1 in (L × W × H) | 11 × 1 × 1 in (L × W × H) |
| In the box | heater, mounting bracket, suction cups | heater, mounting bracket, suction cups |
Figures as published by each maker; see each model’s page for its sources. Open this pair in the full comparison tool →