LS Heater 300W – heater with thermostat for aquariums of 250l – 450l
A 300 W submersible aquarium heater with a built-in thermostat, adjustable between 18°C and 34°C…
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This 300 W heater is intended for aquarists keeping larger tanks in the 250 to 450 litre range who need stable water temperature without manual adjustment. The built-in thermostat switches the heater on when the water cools below the set value and holds the chosen temperature within the 18°C to 34°C working range.
Why it matters
- The thermostat switches the heater on automatically when water temperature drops, so the set temperature is maintained without manual intervention.
- The IPX8 rating means the unit is designed to operate fully submerged, which is required for use inside the tank.
- The large temperature knob and the indicator show the set value and the heater's operating status, so the setting can be checked and changed quickly.
- Suction cups and holders are included, so the heater can be fixed inside the tank without extra accessories.
Specifications
- Power: 300 W
- Supply voltage: 230 V, with a 100 cm power cable included
- Working range: 18°C to 34°C
- Recommended tank volume: 250 to 450 litres
- Minimum water level: 25 cm
- Total dimensions (including knob): 33 cm x 3 cm
- Weight: 0.25 kg
- Water resistance: IPX8
What it works with
The heater suits both freshwater and marine aquariums in the 250 to 450 litre range, provided the water column is at least 25 cm deep. It belongs to the LS series, where each model is matched to a specific tank size, so the 300 W version is the one for this volume band.
Technical specification
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Frequently asked questions
It is designed for aquariums from 250 to 450 litres. Smaller LS-series heaters, such as the 150W for 120–250 L, are sized for smaller tanks.
Yes, the manufacturer states it can be used in both freshwater and marine aquariums. It is rated IPX8, so it can and should operate fully submerged.
The thermostat can maintain water temperature between 18°C and 34°C. A clear indicator light shows when the heater is working.
The minimum water level for safe operation is 25 cm. The heater measures 33 cm x 3 cm including the knob, so check that it fits your tank's water depth.
The package includes suction cups with holders for mounting. The power cable is 100 cm long and the unit runs on 230V mains.
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