Quick Summary
The GlowUp 300W Aquarium Heater is a fish tank heater with an external controller and LED display. It is described for freshwater and salt water aquariums in the 150-350 L range, with overheat and dry-run protection and a stated temperature range of 18-35°C.
The heater also includes a removable protective cover, two suction cups and a 1.82 m power cord. The controller memory function recalls the last setting after a power interruption.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Power | 300W, which helps confirm the heater size against the tank it is intended for. |
| Tank range | 150-350 L for freshwater and salt water tanks. |
| Temperature range | 18-35°C, with 1°C increments for setting the target temperature. |
| Controls | External controller with LED display and one-button adjustment. |
| Protection | Overheat protection and dry-run protection are included. |
| Included items | Two suction cups and a removable protective cover are stated. |
| Cable length | About 1.82 m overall, with 28 cm between the plug and the controller. |
What to Compare Before Buying
- Tank size: This model is stated for 150-350 L tanks, so compare that range with your aquarium volume.
- Temperature setting: Check whether the 18-35°C range and 1°C steps match the level you want to maintain.
- Positioning: The 1.82 m cable length and 28 cm controller lead matter if the socket sits far from the tank.
- Control style: The external controller and LED display suit buyers who want temperature adjustment outside the tank.
- Water type: It is described for both freshwater and salt water tanks, so check that matches your setup.
Compatibility, Size and Fit
This heater is described as suitable for freshwater and salt water aquariums between 150 L and 350 L. The important fit checks are the aquarium volume, the cable reach from socket to tank, and whether the heater can be fully immersed in the intended setup.
The external controller sits apart from the heater body, so it is worth checking where you will place the lead and display before choosing an offer.
What Is Included
- 1 x 300W aquarium heater
- External controller with LED display
- Two suction cups
- Removable protective cover
What Else You May Need
You will need an aquarium setup that allows the heater to be fully immersed and positioned safely within the tank arrangement. If the socket is far from the tank, check that the stated cable lengths suit the space.
Safe Use and Important Precautions
Keep the heater fully immersed in water for correct readings. The unit includes overheat protection that stops heating above 34°C and dry-run protection that shuts it off if it is above water level. Follow the manufacturer’s instructions for placement and use.
Before You Decide
Confirm the aquarium volume, cable reach and temperature range before choosing this heater. Check that you want an external controller, and make sure the tank setup allows full immersion and the stated 1.82 m cable length.





