Reglerheizer 300W – aquarium heater with thermostat
Kruger Meier 300W heater with thermostat for freshwater and marine aquariums of 250–450 l. Fully submersible…
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This 300 W heater with a thermostat is intended for larger freshwater and marine aquariums, where the water temperature must stay stable for tropical species. The thermostat holds the set temperature by switching the heater on when the water cools down, so the keeper does not have to correct the temperature manually.
Why it matters
- The thermostat switches the heater on automatically when water temperature drops below the set value, keeping the tank within the chosen range.
- The temperature knob sits on the top of the unit, so the setting can be changed quickly without removing the heater from the water.
- IPX8 water resistance rating means the unit is designed to operate fully submerged.
- Compact dimensions (33 × 3 cm including the knob) make it easy to position it discreetly in the aquarium.
Specifications
- Power: 300 W
- Operating temperature range: 12–34 °C
- Recommended aquarium volume: 250–450 l
- Minimum water level: 25 cm
- Dimensions including knob: 33 × 3 cm
- Weight: 0.26 kg
- Water type: freshwater and marine
- Water resistance rating: IPX8
- Mounting: suction cups, vertical or horizontal
What it works with
The heater is matched to aquariums of 250–450 l and requires a minimum water level of 25 cm, so it suits large display or community tanks rather than small setups. Because it works in both freshwater and marine water, it can be used in either type of tropical aquarium. Smaller tanks should use a heater with a lower power rating, as this unit is dedicated to the 250–450 l volume range.
Technical specification
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Frequently asked questions
It is designed for aquariums from 250 to 450 litres. The product data lists no other tank size range for this model.
The working range is from 12°C to 34°C. The thermostat switches the heater on when the water temperature drops below the set value.
The minimum water level is 25 cm. The heater is fully waterproof and rated IPX8, so it can work fully submerged.
Yes, the manufacturer states that it is suitable for both freshwater and marine aquariums. Its total dimensions are 33 cm x 3 cm, including the knob.
It can work either vertically or horizontally. It comes with large suction cups that attach it to the inside of the tank.
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