# Cobalt Aquatics Neo-Therm 100W vs Finnex HMA-200S: specs and price compared

A sourced, side-by-side comparison of the Cobalt Aquatics Neo-Therm 100W (Cobalt Aquatics) and Finnex HMA-200S (Finnex) among aquarium heaters. Finnex HMA-200S is the cheaper of the two at $27.19.

## Side by side

| Spec | Cobalt Aquatics Neo-Therm 100W | Finnex HMA-200S |
| --- | --- | --- |
| US price | $49.12 | $27.19 |
| Brand | Cobalt Aquatics | Finnex |
| Wattage (W) | 100 | 200 |
| Tank size range gal | up to 29 gal | 60-80 gal |
| Adjustable thermostat | Yes | Yes |
| Material | plastic | titanium |
| Fully submersible | Yes | Yes |
| Temperature accuracy f | ±0.5°F | ±2°F |
| Shatterproof guard | Yes | Yes |
| External controller | No | Yes |

## Key differences

- Wattage (W): Cobalt Aquatics Neo-Therm 100W 100 vs Finnex HMA-200S 200
- Tank size range gal: Cobalt Aquatics Neo-Therm 100W up to 29 gal vs Finnex HMA-200S 60-80 gal
- Material: Cobalt Aquatics Neo-Therm 100W plastic vs Finnex HMA-200S titanium
- Temperature accuracy f: Cobalt Aquatics Neo-Therm 100W ±0.5°F vs Finnex HMA-200S ±2°F
- External controller: Cobalt Aquatics Neo-Therm 100W No vs Finnex HMA-200S Yes

## Sources

- Cobalt Aquatics Neo-Therm 100W: https://www.bulkreefsupply.com/100w-neo-therm-submersible-heater-open-box-cobalt-aquatics.html (bulkreefsupply.com, verified 2026-08-16)
- Finnex HMA-200S: https://www.bulkreefsupply.com/hma-s-200w-heater-finnex-ob.html (bulkreefsupply.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/aquarium-heaters/cobalt-neo-therm-100w-vs-finnex-hma-200s/
Cite: Per The Front Desk Review, Cobalt Aquatics Neo-Therm 100W ($49.12) vs Finnex HMA-200S ($27.19) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/aquarium-heaters/cobalt-neo-therm-100w-vs-finnex-hma-200s/
License: CC BY 4.0.