Our Best 1Gallon Fish Tank Heater – Top 20 Model Reveled!

Highlighted Features

• 🐠【Small Aquarium Heater】MantaMaze 25W Mini fish tank heater is 4.7 inches long, about 1 inch shorter than the i Phone 13. Ideal for use in 1-6 gallon small glass or acrylic desktop aquarium tanks. It can automatically controls water temperature at 78℉, no need to adjust temperature, making your fish and turtle pets happier.
• 🐠【How to Use This Heater】First fully submerge the 25W aquarium heater horizontally or vertically into the water, then plug in, red light turns on, the heater will start working until water temperature up to 78°F, and red light off, then the green light turns on, heater stop working and keeping constant temperature 78°F. Accuracy Range：±3°F.
• 🐠【Precautions for Use】MantaMaze small aquarium fish/turtle tank heater should be 100% completely submerged in water before plugging in, do not operate or leave the heater plugged in when your fish tank is out of water. Please unplug the power plug first before changing the water or cleaning the fish tank, and then take out the tank heater.
• 🐠【Durable Betta Heater】The submersible aquarium heater is made of explosion-proof glass material and a high-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction, faster water heating and longer lasting. And the stronger black shell is a high temperature resistant ABS material which protect the fish, your aquatic organisms and you from scalding.
• 🐠【Reliable Customer Support】This small aquarium heater is a great gift for fish lovers. We are committed to the research and production of aquarium heater and provide 12 Month Warranty and 24 Hour Professional After-sales Service. In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement.

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Highlighted Features

• SUPER MINI SIZE – This small aquarium heater is “thumb size” - only 1.97” (5cm) in length. Great for nano tanks / betta tanks. The innovative super mini size perfectly solves the headache of the fish keepers on the traditional heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F, for up to 1 Gallon tanks.
• SAFE VOLTAGE 5V/2A USB POWER SUPPLY – This 5V/2A USB power supply is very safe. You are TOTALLY away from the worry of electric shock to your beloved fish! Use a 5V/2A power adapter, or a 5V/2A power bank to supply power to the heater. (Power adapter or power bank is not included)
• ACCURATE TEMPERATURE – Thanks to the intelligent inverter technology, with the in-built chips this thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled heaters. The thermostat shows 2 readings – the current temperature and the set temperature – very easy to operate.
• OVERHEATING PROTECTION – Full consideration of safety. This fish tank heater will stop working when the water temperature exceeds 97F. You are free from “cooking fish”! MEMORY FUNCTION – The last setting is stored in the thermostat. In case of a power cut, when the power recovers the heater will follow the last setting.
• MULTIPLE USES – This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles, pet fountains, and plant seedling.

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Highlighted Features

• 【25W Aquarium Heater】Orlushy 25w fish tank heater can be applicable to 1-6 gallons tank. It is 4.7 inches in length, ideal for use in low water level and won’t take up mech place, easy to hide in small tank. Please fully submerged the heater vertically into water in fish tank, and horizontally into water in turtle tanks.
• 【Easy to Operate 】This aquarium heater is automatic constant temperature heating when the power is switched on. The preset temperature is 78℉. Accuracy is ±3℉. Stair shape heating that red light is on and heater starts to intermittently heat the water to the preset temp, saving energy and electricity. When green light is on, heater stops working and maintains constantly 78℉.
• 【Durable & Material】 The durable material of the heater ensures safe operation. The outer shell covering the whole body of the heater is made of heat-resistant ABS material that it won’t deform and melt under high temperature. The heating rod is made of nickel-chromium heating wire to faster heating rate, and non-corrosive quartz glass.
• 【Cautions】 1.Please ensure the heater is 100% submerged into the water before plug in the power. 2. Please unplug the power and cool down the heater for 10-20 minutes before taking it out to clean the fish tanks or change the water.
• 【Guaranteed Customer Service】 Orlushy fish tank heater is made with great safety and durability for use. We guarantee 1 -Year warranty. If there is any issue with our product, please contact us, and we would gladly offer you after-sales service.

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Highlighted Features

• SUPER MINI SIZE – This small aquarium heater is “thumb size” - only 2.36” (6cm) in length. Great for nano tanks / betta tanks. The innovative super mini size perfectly solves the headache of the fish keepers on the traditional heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F, for 1-2 Gallon tanks.
• ACCURATE TEMPERATURE – Thanks to the intelligent inverter technology, with the in-built chips this thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled heaters. The thermostat shows 2 readings – the current temperature and the set temperature – very easy to operate.
• DRY RUN / OVERHEATING PROTECTION – Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 97F. You are free from “cooking fish”!
• MEMORY FUNCTION – The last setting is stored in the thermostat. In case of a power cut, when the power recovers the heater will follow the last setting.
• MULTIPLE USES – This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles, pet fountains, and plant seedling.

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Highlighted Features

• PERFECT MINI HEATER FOR 1~1.5 GALLON TANK - For a Betta breeder with a 1 to 1.5 gallon small tank, it is very difficult to choose a suitable heater. Because most of the heaters on the market are too big for this small tank. This not only affects us to watch our beautiful Betta, but also reduces the activity space of the Betta. Now DaToo Mini Aquarium heater can help you solve this problem. Ultra-small and thin size, perfectly hidden in a 1~1.5 gallon tank, your Betta will be happy with it! !
• CONSTANT TEMPERATURE & NO NEED TO ADJUST - DaToo 10W MINI Aquarium Heater can automatically maintain a constant temperature between 75°F and 82°F (depending on the external environment), no need to set. This temperature range is ideal for most tropical fish and is very beneficial for the reproduction of betta and promotes their metabolism. With no extra work, just plug it in and the DaToo 10Watt Small Fish Tank Heater will help your fish stay healthy and comfortable. Great for kids!!
• 24V SAFE VOLTAGE & POWER OFF AFTER LEAVING WATER - The output voltage of the DaToo Betta Heater is only 24V, which not only ensures the safety of the fish, but also ensures the safety of the user. No need to worry about leakage, you can rest assured to use it for your children. The Betta heater needs to be completely submerged in the water. If it leaves the water, it will automatically stop heating to prevent dry burning (heating indicator is green), which is very safe.
• PTC HEATING & ONLY SUITABLE FOR FRESHWATER - Unlike conventional glass aquarium heaters, PTC has better thermal conductivity and heating rate, no explosion, no breakage. Very energy efficient and environmentally friendly. Your child can operate it easily and is very safe. This mini fish tank heater is only suitable for fresh water tanks.
• ATTENTION & ONE YEAR WARRANTY - This is 10W MINI Aquarium Heater, size is 3*2*0.26 inch, fit 1~1.5 gallon small tank. Only for fresh water tanks. One Year Warranty and 100% Money-back Guarantee. Buy DaToo products with confidence. JUST DO IT, Let’t Go!!

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Highlighted Features

• 🐟HITOP Mini size aquarium heater 25W with controller, suitable for seawater and freshwater heating, betta fish and turtle tanks and other small fish tanks or fish bowl 1-6 gallon.
• 🐟Easy to operate: This fish tank heater is easy to use, 6Ft long cable wire and the external controller can easily set the temperature, and the temperature adjustment range is 68-93℉.
• 🐟Easy to read temperature: The controller of this heater has Digital LED temperature display, which can display the real-time water temp and set temp, so that you can know the temperature changes in the fish tank easily. There is also a clear heating indicator on it.
• 🐟Fish-friendly: This aquarium heater is made of thickened quartz glass, and has good sealing performance to prevent water from entering, making it a more fish-friendly heater.
• 🐟Package: Comes with two suction cups, a bottom cover, and a sticker-thermometer. Please check the product carefully before using it, we provide a 12-month warranty for this product.

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Highlighted Features

• 𝟮𝟱𝙒 𝘽𝙚𝙩𝙩𝙖 𝙏𝙖𝙣𝙠 𝙃𝙚𝙖𝙩𝙚𝙧: Length - is 6.8 inches, 110V/60Hz, Cord length is 4.0ft, Suitable for 1-5 gallons aquarium, IP 68 waterproof, anti-corrosion, please choose the right wattage aquarium heater according to our size chart
• 𝙏𝙚𝙢𝙥𝙚𝙧𝙖𝙩𝙪𝙧𝙚 𝙍𝙖𝙣𝙜𝙚 𝟲𝟯-𝟵𝟱℉: Adjustable aquarium heater for easy use, just turn the top knob to freely adjust the temperature you need. We also provide a free sticker thermometer for each customer, so you can observe the water temperature of the fish tank at any time
• 𝙃𝙤𝙬 𝙞𝙩 𝙒𝙤𝙧𝙠𝙨: Plug in the power supply and check whether the indicator is on. The yellow light means the heater is working. When the water temperature is lower than the set value, the fish heater will automatically start heating. When the water temperature reaches the set value, the heating will stop and the indicator lights off
• 𝘿𝙪𝙧𝙖𝙗𝙡𝙚 𝙈𝙖𝙩𝙚𝙧𝙞𝙖𝙡: Use high-quality 2mm thickened glass with excellent explosion-proof performance, and anti-corrosion, which can be used in fresh water and salt water. Double sealing design, IP 68 waterproof, insulating, anti-leakage, safe and reliable to use
• 𝙁𝙪𝙡𝙡 𝙎𝙪𝙗𝙢𝙚𝙧𝙨𝙞𝙗𝙡𝙚 𝙒𝙖𝙩𝙚𝙧 𝙃𝙚𝙖𝙩𝙚𝙧: Betta fish tank heater must be completely submerged in the water before turning on the power. To clean the tank or move the heater, unplug it first. We provide a 1-year warranty for our products. If you have any suggestions for this heater, please feel free to let us know. Let's create a warm and comfortable environment for your lovely fish together!

Additional Info :

Highlighted Features

• 【Super Mini Size, 10Watt, below 1 Gallon】YukiHalu 10W aquarium heater is designed for the mini fish tanks less than 1 gallon. 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. The rated voltage DC 5V/2A. Important tips: insufficient power of the adapter will cause no heating and the number will flash or the controller restarts repeatedly, make sure the power adapter is 5V 2A and has enough power.
• 【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 & DC 5V USB supply】The power will be cut off and stop heating automatically if the heater overheating. Protect your fish. Never cook your fish. USB 5V power supply, prevent electric shock. 30days full refund, 12-months warranty.
• 【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. Easy to install.
• 【Built-in Thermometer, 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 thermometer. The heater will remember the temperature setting, no need to reset the temperature after power off.

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Highlighted Features

• Compact Mini size: This heater measures just 1.97 inches (5 cm) in length. Take up less space than conventional heaters, is easy to hide, but has full power and is suitable for fish tanks of up to 2 gallons. Temperature range 64-93F or 18C-34C, suitable for most fish.
• Precise Heating: The mini fish tank heater has a built-in intelligent chip, which can precise heat at an accuracy of 1F/0.1°C. When the water temperature reaches the set temperature, it will stop heating, and the heater will keep the water temperature fluctuating around 1F/0.1°C of the set temperature. LED display can display the current water temperature and set temperature, which is very convenient
• Overheating & Dry Burning Protection: When the water temperature exceeds 93F/ 34C, the heater will stop working until the water temperature is below 93F/34C to prevent hurting your fish. Built-in water level sensor, when the heater is out of the water, it will stop heating to avoid the heater overheating and short-circuit burning
• USB Powered: The heater has a USB interface, the input voltage is 5V and the current is 2A, which is very safe for you and your fish. You can use a 5V/2A power adapter or power bank to supply power to the heater (Note: The heater will not work properly if the voltage is less than 5V or the current is less than 2A)
• Multiple Uses: This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also heat turtle tank, pet drinking water, and aquatic plants. If you have any questions about our products, please feel free to contact us, and we will give you a satisfactory answer within 24 hours

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Highlighted Features

• The Slim heater will increase the water temperature of mini aquariums up to 10 gallons by a few degrees compared to the ambient room temperature; The Slim heater can be used in glass, acrylic, plastic fish bowls and aquariums; Safe to use under gravel; Please note, Slim heaters are not suitable to be used in environments without water
• Extra small slim fish tank heater is a great choice for Betta fish & suitable for fish tanks 2 to 5 gallons, measures 3.5-inch diameter, 7.5 watt; Plug and Play universal fish tank heater; No temperature to set; slim heater provides warmth for betta fish without taking up much room
• Heater can easily be placed submerged in water or even under the tank gravel; The 90 degree angle makes this great for Betta acquariums; Safe to use in glass, plastic and acrylic fish tanks
• Plug & play universal fish tank heater, the slim fish tank heater can be used in both fresh or saltwater environments
• Easy to hide fish tank heater is ideal to use for betta fish, gold fish and glow fish

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Highlighted Features

• 🐠Mini Size Aquarium Heater: This small aquarium heater is only the size of your hand, measuring only 6.3x1.65x1.18 inch, perfect for small round glass tanks, acrylic tanks, nano tanks or betta tanks, with a unique look and mini size design that takes up little space and is easy to hide! Please choose the right wattage aquarium heater according to our size chart.
• 🐠Dual Temp Control Digital Display Controller: This small fish tank heater is equipped with dual relays and an intelligent heating constant temp system. It has two heating scales-℉ and ℃. The temperature control range is 59-93℉/15-34℃, and the temperature control accuracy is within 2℉. Controller Display the current temperature and set temperature, press the temperature control button to adjust the set temperature, press and hold the control button for 5-8 seconds to switch between ℉ and ℃.
• 🐠Intelligent Water Sensor and Prevent Dry Burning: This mini aquarium heater has a unique intelligent temperature and water sensor system, the heater will automatically stop heating when the heater temperature sensor is exposed to the surface of the water 5cm and current temperature will display “E1”. This tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 93℉.
• 🐠Quartz Glass Aquarium Heater: The small betta tank heater is made of explosion-proof quartz glass material and a high-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction, faster water heating and longer lasting. And the stronger black shell is a high temperature resistant ABS material which protect the fish, your aquatic organisms and you from scalding. You are free from “cooking fish”!
• 🐠Memory Function and Multiple Uses: When this aquarium heater is disconnected from the power supply and plugged in again, the set temperature will automatically remember the last temperature without readjustment. This mini heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles and plant seedling.

Additional Info :

Highlighted Features

• 【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. 30days full refund, 12-months warranty.
• 【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 Thermometer, 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 thermometer. The heater will remember the temperature setting, no need to reset the temperature after power off.

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Highlighted Features

• 【50W COMPACT FISH HEATER】Voltage: 110-120V/60HZ. The power cord is 4.1ft. Suitable for up to 10-gallon tank. With 2 strong suction cups on the back of the fish heater, it's easy to install it on glass, acrylic, or plastic tank. Great for freshwater and saltwater aquariums.
• 【OVERHEAT & RUN-DRY PROTECTION】The fish tank heater has a unique smart circuit board and sensor system. When out of water or heats beyond the set temperature, it will automatically stop heating and display an error code until the water temperature is below 96°F or fully submerged. No need to unplug the power or reset the controller.
• 【EFFICIENT AND EXPLOSION PROOF】The small aquarium heater is made of quartz glass material, which is explosion-proof and crack-proof. More sturdy and durable, without worrying about damage. High-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction. Faster water heating and longer-lasting.
• 【EXTERNAL CONTROLLER】You can adjust the water temperature without getting your hands wet. Easy to use and safe. Adjustable temperature range from 64℉ to 91℉. Every time you set your betta fish heater, just press the button repeatedly until it reaches the temperature you want. Notice: The controller cannot be put in water.
• 【SATISFACTION GUARANTEED】Our aquarium heaters are designed with durability and safety in mind in every way. If you have any questions, please feel free to contact us! We will be happy to provide a prompt refund or replacement with a new product. 12 months warranty and 24 hours professional after-sales service.

Additional Info :

Highlighted Features

• 【 Betta Heater】 This 25W fish tank heater is suitable for 1-6 gallons glass or acrylic aquariums. Please choose the appropriate wattage betta heater according to your aquarium size.
• 【Automatic constant temperature】When the water temperature reaches 78°F, the green light is on, stops working and will automatically keep the water temperature of the fish tank at 78℉. This temperature is very suitable for betta and most tropical fish. When the water temperature is lower than 78°F, the heater automatically starts to heat and the red light is on.
• 【Note 】The Aquarium heater needs to be used for 100% diving, the heater must be fully submerged into water. Please unplug the power plug when changing the fish tank. The heater rod is suitable for people over 16 years old.
• 【Mini fish tank heater】 For most fish lovers who have small fish tanks of 1 to 5 gallons , a small heater means more space for fish.
• 【Easy installation】Vertical or horizontal placement into the water using, automatic temperature control 78°F, no need to adjust temperature, simple operation.

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