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Automatic constant the water temperature. How it works? Press the 'SET' button to adjust the temperature. Press once, the temperature will increase 1°F, Press the button several times until the target value is reached. Temperature can be accurately adjusted from 64 to 93°FNo operation for 3 seconds, the setting is confirmed to be activatedThe heater starts heating. Red indicator lights onStop heating automatically when the setting temperature reached. Green indicator lights on. Automatic constant temperature with 1℉ accuracy. The heater works in variable frequency mode based on PID control strategy Out of water protection / Overheating protection. Never cook your fish E1: out of water protection. The power will be cut off and stop heating automatically if the heater leaves the water or the heater do not fully immerse in the water. Display 'E1' error code. The heater will re-work if it goes back to water.H1: Overheating protection. The power will be cut off and stop heating automatically if the water temperature exceeds 95°F, Display 'H1' error code. The heater will re-work if the water temperature below 93°F.Other codes: contact to replace a new kit. Choose right heater according to aquarium Volume Size chart: 25W: 1-5 Gallons50W: 3-10 Gallons100W: 8~20 Gallons200W: 15-40 Gallons Parameters: Voltage: 100~130V/50~60HZ, 25 / 50 / 100 / 200 WattsTemperature Range: 18~34 °C / 64~93 ℉Temperature Accuracy: 0.5 °C / 1 ℉Power Cord length：4.2Ft Small size. Perfect for a mini fish tank Compact design, Small size heaterTake less space in the fish tankEasy to hide in the tankFit for mini aquarium tanks External temperature controller Easy to set temperature. Never Wet Your HandsEasy to read. Digital LED displayBuilt-in Thermometer. Dual built-in temperature sensorIntelligent Indicator Light. Green: no heating / Red: heating 1℉ accuracy with smart memory function Automatic constant temperature with 1℉ accuracy as Intelligent Frequency Conversion TechnologyThe heater will remember the temperature setting, no need to reset the temperature after power off CAUTIONS The device must be used under rated voltage 100-130V.The heater must be fully submersed into the water. The external temperature controller must be kept away from the water as it is not waterproof.When there is moss or other dirty on the heater surface and the LED screen, it needs to be cleaned up with soft brush in time.Disconnect power socket and wait for 15 minutes before changing water or remove heater.Place the heater in the way of water flow and don't bury it.Check before installation. Check the glass tube first before installation, if the glass tube is cracked (not completely broken), do not use it.The suction cups must be cleaned every month to prevent the heater from falling off and breaking because the suction force is weakened by stains.
【Super Mini Size, 25Watt for 1-5 Gallons】 YukiHalu 25W aquarium heater is designed for 1-5 gallons mini fish tank. Compact design, take less space in the fish tank, easy to hide in the tank. Temperature can be accurately adjusted from 64 to 93°F. This heater suitable for both saltwater and freshwater. The rated voltage is 100-130V.
【Automatic Constant Temperature with 1℉Accuracy】Thanks to advanced Intelligent Frequency Conversion Technology, the water temperature can be kept constant with an accuracy of 1℉. The heater's working frequency will be changed according to temperature variation, and the heating is automatically stopped when the set temperature is reached. Compare to traditional heater, this new technology will cut down 49% electricity bill for you.
【Overheating Protection, Out of Water Protection】The power will be cut off and stop heating automatically if the heater out of water or overheating. Protect your fish. Never cook your fish.
【External Temperature Controller, Never Wet Your Hands】Use an external controller to set the temperature instead of immersing your hands in water to rotate the dial. Never wet your hands or contaminating your tank. Strong suction cups, easy to install.
【Built-in Temperature Sensor, Power-off Memory Function】Dual built-in temperature sensor, the water temperature will be displayed on the external temperature controller in real time. No need to buy other aquarium temperature meter. The heater will remember the temperature setting, no need to reset the temperature after power off.
【Daily maintenance】The suction cups must be cleaned every month to prevent the heater from falling off and breaking because the suction force is weakened by stains.
【Check before installation】Check the glass tube first before installation, if the glass tube is cracked (not completely broken), do not use it
I liked the adjust ability and digital temp display on this nano tank heater. The first one just wouldn't settle properly on the desired temp and was 6 degrees high on the display. I returned it and got the new one with no problem....Thanks to Amazon's wonderful business practices. This heater is right on the temp and works the way I had hoped. My old heater still worked but the temp is not adjustable and I needed one to push up to 80 degrees f for tank cycling/bacteria growth. This heater does that job to a tee. And the display is very nice feature now that it's accurate.
