Seaoura SR-317 Submersible Aquarium Heater

About Item

• DOUBLE ALARM & SAFETY SHUTOFF: The SEAOURA Fish Tank Heater features over-temperature protection. When the water temperature exceeds the safe temperature you set, or the heater or temperature probe is exposed to air (such as during a water change), it will automatically stop heating and activate an alarm sound to remind you to check the tank in time. 100W -300W heater length 10.4 IN, power cord length 37.4+59 IN, temperature sensor cord length 19.68 IN. 500W heater length 13.58 IN, power cord length 37.4+59 IN, temperature sensor cord length 19.68 IN.

• TEMPERATURE PROBE AND EXTERNAL CONTROLLER: The temperature probe wire is directly connected to the heating rod, which can measure the temperature of more areas in the fish tank. Real-time monitoring of water temperature can prevent over/under temperature in the aquarium, with no need to buy an additional aquarium thermometer. An external controller to set the temperature, safer and more convenient. Suction cups can fix the heater and probe to avoid drifting

• 0.1℉ PRECISE TEMPERATURE CONTROL: The 800W submersible aquarium heater is designed to provide consistent heating for 100- 180-gallon tanks. Short-pressing the ± button can precisely control ±0.1℉/℃, and long-pressing the ± button can quickly adjust ±0.1℉/℃. Memorise the setting after a power failure, it can automatically restore the last setting temperature after a sudden power failure, no need to reset

• VARIABLE FREQUENCY HEATING: Turtle tank heater will adjust the heating speed according to the temperature in the tank, when the water temperature in the tank is a big gap from the set temperature, the heater will work at full power to warm up quickly, when the water temperature in the tank is close to the set temperature, the heater will work at a lower power to warm up gently. Saving power and avoiding sudden temperature fluctuations that can cause stress to aquatic organisms

• LED DUAL DISPLAY: Bright screen displays real-time temperature and heating status (red = heating in progress, white = finished heating). Fahrenheit and Celsius temperature control range: 63-94°F/17-34°C. Easy-to-read design allows you to monitor the temperature of your fish tank or breeder. Ideal for turtles, bettas, and tropical fish

• DURABLE AND UNBREAKABLE: Our fish heater is built with a thickened quartz heating tube, and the shell is equipped with a sturdy, high-temperature-resistant ABS material that resists cracks caused by impact or water pressure. A pure nickel alloy heating element lasts longer and generates heat faster. Suitable for freshwater and saltwater aquariums, reef tanks, and aquascapes

FAQ about SR-317 Aquarium Heater

Q1: What makes this aquarium heater safer than traditional heaters?

A1: This Seaoura heater features a double alarm and automatic safety shutoff system. It will stop heating and trigger an alarm if the water temperature exceeds the preset limit or if the heater/probe is exposed to air during maintenance, helping prevent overheating and dry-burn risks.

Q2: Does this aquarium heater need a separate thermometer?

A2: No. The built-in temperature probe provides real-time water temperature monitoring from multiple areas of the tank, eliminating the need for an additional aquarium thermometer.

Q3: How precise is the temperature control?

A3: The heater supports ultra-precise ±0.1°F/℃ adjustment, allowing stable and accurate temperature control for sensitive aquatic environments such as turtles, tropical fish, and reef tanks.

Q4: What is variable frequency heating and why is it important?

A4: Variable-frequency heating automatically adjusts power output based on water temperature. It heats at full power when the water is cold and switches to lower power near the target temperature, reducing temperature fluctuations and helping prevent stress to aquatic life while saving energy.

Q5: Will the heater remember my settings after a power outage?

A5: Yes. The heater has a memory function that automatically restores your last set temperature after a power failure, so you don’t need to reset it manually.