sera aquarium heater thermostat

The sera aquarium heater thermostat is a compact, high-quality immersion heater designed to maintain stable water temperatures in small to medium aquariums. It features shock-resistant quartz glass and a protective grid for safe contact with aquatic life. The thermostat offers an adjustable temperature range from 18 to 32 °C and delivers 75 W of power, combining compact dimensions with reliable thermal regulation and a visible function indicator.

Advantages

The heater's shock-resistant quartz glass construction increases durability and reduces the risk of breakage. A precision protection circuit helps maintain consistent performance and prevents overheating. The protective grid minimizes direct contact between fish and the heating element, while the short, space-saving design allows simple installation in compact tanks. A small control lamp indicates when the heater is active, providing clear operational feedback.

Suitable for

• Small to medium freshwater and tropical aquariums where space is limited
• Maintain stable temperatures for aquarium fish and plants in the 18–32 °C range
• Use in tanks requiring a compact heater with visible on/off indication

Key specifications

• Adjustable temperature range: 18–32 °C
• Power output: 75 W
• Shock-resistant quartz glass heating tube
• Protective outer grid for safe contact
• Compact, short form factor suitable for small aquariums
• Visible function indicator lamp (on/off)

How to use

Submerge the heater fully in the aquarium water before switching it on and secure it vertically or horizontally according to the tank layout, using suction cups or mounting brackets if provided. Set the desired temperature within the 18–32 °C range using the built-in adjustment control. Allow the heater to stabilize and monitor the aquarium thermometer until the target temperature is reached. The indicator lamp will show when the heater is actively heating; avoid powering the unit while it is outside water.

Usage recommendations

Place the thermometer away from the heater to obtain an accurate reading of the general water temperature. Regularly check the protective grid and glass for damage and replace the heater if any cracks or significant wear appear. For consistent temperature control, avoid placing the heater directly under heavy filtration outflow that could create rapid temperature fluctuations.