Sized for a 10 gallon tank
| Model | Rated for | Power | Length |
|---|---|---|---|
| Aqueon Aquatic Flat Heater 15 W Flat · Rated 5–10 gal, but it has no temperature to set and adds up to 6 °F to the room, so it reaches 78 °F only in a room of 72 °F or warmer. | 5–10 gal | 15 W | Not published |
| hygger Precise Aquarium Heater 50W Adjustable, electronic | 5–10 gal | 50 W | 5.9 in |
| Tetra HT10 Preset | 2–10 gal | 50 W | Not published |
| hygger Digital Mini Heater 50W Adjustable, electronic | 0.4–11.9 gal | 50 W | Not published |
| Fluval M50 Adjustable submersible | Up to 15 gal | 50 W | 11 in |
| hygger Titanium Tube Heater 50W Adjustable, electronic | 10–15 gal | 50 W | 7.09 in |
| EHEIM thermocontrol 50 Adjustable submersible | 6.6–15.8 gal | 50 W | 9.6 in |
| hygger Digital Mini Heater 75W Adjustable, electronic | 0.4–15.9 gal | 75 W | Not published |
| Aqueon Pro 50 Adjustable, electronic | Up to 20 gal | 50 W | 9 in |
| Aqueon Submersible Glass Heater 50 W Adjustable submersible | Up to 20 gal | 50 W | 8.75 in |
| hygger Precise Aquarium Heater 100W Adjustable, electronic | 10–20 gal | 100 W | 5.9 in |
| Aqueon Preset Heater 50 W Preset | Up to 20 gal | 50 W | Not published |
| Cobalt Aquatics Neo-Therm Pro 100W Adjustable, electronic | Up to 29 gal | 100 W | 9.75 in |
| Fluval E100 Adjustable, electronic | Up to 30 gal | 100 W | 11.75 in |
| Fluval M100 Adjustable submersible | Up to 30 gal | 100 W | 11 in |
| Aqueon Preset Heater 100 W Preset | Up to 30 gal | 100 W | Not published |
| Tetra HT30 Preset | 10–30 gal | 100 W | Not published |
| Aqueon Submersible Glass Heater 100 W Adjustable submersible | Up to 40 gal | 100 W | 10.325 in |
The charts are for an average room. In a colder room, or a tank without a lid, work out your own figure in the heater size calculator; for a warmer one, the smaller heaters here are enough.
Rated for it, but more than it needs
These cover 10 gallons, but they are much more powerful than the makers’ charts ask for. If its thermostat sticks on, an oversized heater overheats the water faster.
- Fluval M150: Rated up to 45 gal, but its 150 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Pro 150: Rated up to 55 gal, but its 150 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Submersible Glass Heater 150 W: Rated up to 55 gal, but its 150 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Preset Heater 150 W: Rated up to 55 gal, but its 150 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Fluval E200: Rated up to 65 gal, but its 200 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Fluval M200: Rated up to 65 gal, but its 200 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Pro 200: Rated up to 75 gal, but its 200 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Submersible Glass Heater 200 W: Rated up to 75 gal, but its 200 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Preset Heater 200 W: Rated up to 75 gal, but its 200 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Fluval M300: Rated up to 80 gal, but its 300 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Pro 300: Rated up to 100 gal, but its 300 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Aqueon Submersible Glass Heater 300 W: Rated up to 100 gal, but its 300 W is more than twice the 50 W the makers’ charts give for 10 gallons.
- Fluval E300: Rated up to 100 gal, but its 300 W is more than twice the 50 W the makers’ charts give for 10 gallons.
Not for a 10 gallon tank
- hygger Digital Mini Heater 15W: Rated 0.4–2.64 gal: too small for 10 gallons.
- Aqueon Aquatic Flat Heater 7.5 W: Rated 1–3 gal: too small for 10 gallons.
- hygger Digital Mini Heater 25W: Rated 0.4–5.3 gal: too small for 10 gallons.
- EHEIM thermocontrol 25: Rated 5.2–6.6 gal: too small for 10 gallons.
- hygger Titanium Tube Heater 100W: Rated 15–20 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 75: Rated 15.8–26.4 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 100: Rated 26.4–39.6 gal: built for bigger tanks than 10 gallons.
- Aqueon Pro 100: Rated 15–40 gal: built for bigger tanks than 10 gallons.
- hygger Precise Aquarium Heater 200W: Rated 20–40 gal: built for bigger tanks than 10 gallons.
- hygger Titanium Tube Heater 200W: Rated 30–40 gal: built for bigger tanks than 10 gallons.
- Tetra HT40: Rated 30–40 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 125: Rated 39.6–53 gal: built for bigger tanks than 10 gallons.
- Tetra HT55: Rated 40–55 gal: built for bigger tanks than 10 gallons.
- hygger Precise Aquarium Heater 300W: Rated 40–60 gal: built for bigger tanks than 10 gallons.
- hygger Titanium Tube Heater 300W: Rated 50–60 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 150: Rated 53–79 gal: built for bigger tanks than 10 gallons.
- hygger Titanium Tube Heater 500W: Rated 70–80 gal: built for bigger tanks than 10 gallons.
- hygger Precise Aquarium Heater 500W: Rated 55–100 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 200: Rated 79–106 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 250: Rated 106–159 gal: built for bigger tanks than 10 gallons.
- EHEIM thermocontrol 300: Rated 159–264 gal: built for bigger tanks than 10 gallons.
Before you choose
Put the heater where the filter’s flow passes it, so the warmth spreads, and check the temperature with a separate thermometer. How to size and place a heater.
Tank pages: 10 gallon · Filters for a 10 gallon tank →