Fluval
Fluval E300
$72.99
Best Aquarium Heaters · head-to-head
Fluval E300 vs Cobalt Aquatics Neo-Therm 100W
A sourced, side-by-side comparison. Cobalt Aquatics Neo-Therm 100W is cheaper at $49.12. Every spec and price links to its source.
Cobalt Aquatics
Cobalt Aquatics Neo-Therm 100W
$49.12Cheaper
Which is better: the Fluval E300 or Cobalt Aquatics Neo-Therm 100W?
On the specs we track, they're closely matched. The Cobalt Aquatics Neo-Therm 100W is the cheaper at $49.12.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Fluval E300 | Cobalt Aquatics Neo-Therm 100W |
|---|---|---|
| US price | $72.99 | $49.12 |
| Brand | Fluval | Cobalt Aquatics |
| Released | — | — |
| Wattage (W) | 300 | 100 |
| Tank size range gal | up to 100 gal | up to 29 gal |
| Adjustable thermostat | Yes | Yes |
| Material | glass | plastic |
| Fully submersible | Yes | Yes |
| Temperature accuracy f | — | ±0.5°F |
| Shatterproof guard | Yes | Yes |
| External controller | No | No |
Sources — Fluval E300: aquacave.com (verified 2026-08-16). Cobalt Aquatics Neo-Therm 100W: bulkreefsupply.com (verified 2026-08-16).
What's the difference between the Fluval E300 and Cobalt Aquatics Neo-Therm 100W?
Where the two actually differ on the specs we track (3 of 8). Matching specs are omitted.
- Wattage (W): Fluval E300 300 vs Cobalt Aquatics Neo-Therm 100W 100
- Tank size range gal: Fluval E300 up to 100 gal vs Cobalt Aquatics Neo-Therm 100W up to 29 gal
- Material: Fluval E300 glass vs Cobalt Aquatics Neo-Therm 100W plastic