10 Best Aquarium Heater of September 2025

• ★100W aquarium heater is suitable for 15 to 30 gallons aquariums,Length - 9",voltage 110-120V, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart.
• ★It shows an area to adjust the temperature. It's not exactly accurate but it turns easy and can be adjusted at small intervals.
• ★Explosion Proof: 2mm thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank.
• ★Precise temperature dial from 68 to 89°F allows for complete control of aquatic climate within a 1-degree difference.
• ★Adjustable Aquarium Fish Tank Water Heater Sensitive and reliable thermostat maintains uniform temperature. Automatic shut off when the temperature is reached

Orlushy

• All Tetra HT heaters have indicator lights to let you know when the heater is on. It will be red when heating and green when the proper temperature has been reached.
• The HT10 uses a built in electronic theromstat to automatically maintain water at 78° F which is ideal for most tropical fish. No adjustment is requried.
• Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies
• The HT heater is fully submersbile and can be installed vertically or horizontally. It's small footprint makes it easy to conceal behind plants or other décor.
• Please read all label information upon delivery. DO NOT plug heater into an electrical outlet until it is placed inside the aquarium.

Tetra

• ★【25 Watt Heater】： This Aquarium heater is suitable for 1 to 5 gallons aquariums, Length - 6.8 inch,voltage 110-120V, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.
• ★【Temperature range】: 63°F~95°F , It is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time.
• ★【Intelligent temperature control】： Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. Furthermore, Automatic safety shut-off feature, and overheating protection.
• ★【Note】: 1. Aquarium heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.,Please unplug the power supply when cleaning the fish tank or aquarium water changes. 2. Heater rod is suitable for people over 16 years of age. Children or minors should be under adult guidance or supervision.
• ★【SATISFACTION GUARANTEED】Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, 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. 12 Month Warranty and 24 Hour Professional After-sales Service.

FREESEA

• PRECISE TEMPERATURE CONTROL: An intelligent IC chip controls the heater temperature, making the temperature difference within ±1℃/±2ºF; Provide the best living environment for your aquatic creatures
• SAFETY GUARANTEE: Made with IP68, the highest waterproof level; and a titanium tube material that features explosion-proof and anti-corrosion engineering, which makes this submersible heater more resistant to damage while heating better than traditional glass heaters; Built with overheat and water shortage protection
• EXTERNAL TEMPERATURE CONTROLLER: The touch-button controller adjusts the temperature without getting your hands wet. It’s easy to control the temp from 68℉/20°C to 94℉/34°C; Check the size chart to find your desired fish tank heater
• EASY TO SETUP: 300W submersible heater is suitable for 50 to 60 gallons aquariums; Vertical or horizontal installation and ensure the device is fully submerged underwater
• WIDE COMPATIBILITY: The fish tank aquarium heater has CE, FCC and ROHS certification and the plug has a UL certification; Applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems

VIVOSUN

• High quality quartz glass
• Fully-submerisble
• Visible temperature setting
• For use in fresh or saltwater aquariums

ViaAqua

• ★ 50W Submersible Aquarium Heater is Suitable for 3-15 Gallon.Temperature range: 65°F~93°F（18°C~34°C）, power cord is 5 FT.
• ★ LED Display Design: LED digital display, External temperature controller,easy to use and Safety.
• ★ The Digital Smart Aquarium Heater is a heater and thermometer combined into one, eliminating the need for more equipment in smaller tanks.
• ★ Please be sure that the heater needs to be completely sunk into water, horizontal or vertical fixed in the water cycle better place, and let the working light can be seen as clear as possible.
• ★ Applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems

Orlushy

• Dual temperature sensors provide accurate and real time water temperatures
• LCD temperature display available in both Fahrenheit and Celsius; Range of 68 to 93 degrees Fahrenheit
• Fast heat technology built with a safety shut-off; Integrated fish guard to protect fish and invertebrates
• Equipped with a slim profile mounting bracket; Colored display alert system
• Suitable for aquariums upto 100 gallons; 300 watts; 5 year warranty
• Check out user manual under product details before using the item.
• The heater is factory calibrated. Variables such as lower room temperature, wide fluctuations, lack of an aquarium cover, presence of submersible pumps and filters, aquarium placement in proximity to cooling sources, may require a higher wattage for proper control. The volumes indicated are approximate values corresponding to water temperatures Upto 26°C/78°F with a room temperature of 20°C/68°F. If the ambient temperature is higher than the set temperature of at least 1°C/2°F, or external sources of heat elevate the aquarium temperature more than 1°C/2°F, the LCD display will remain red until conditions change

Fluval

• ★ Temperature range: 59°F~94°F, display Fahrenheit °F, this heater is designed for1~10 gallons tank.
• ★ Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating.
• ★ Touch button, cyclic adjust temperature , easy to use and Safety.
• ★【Note】:this heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.
• ★【SATISFACTION GUARANTEED】Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, 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. 12 Month Warranty and 24 Hour Professional After-sales Service.

FREESEA

• DaToo Aquarium Heater - How to make our beloved fish live in a comfortable environment? This is a matter of concern. No suitable temperature, our fish will not survive healthy. The DaToo Submersible Aquarium Heater is a system that create a warm and comfortable living environment for your lovely fish. Select DaToo Aquarium Heater, Let us care about your fish starting from the temperature.
• Adjustable Temperature - Only need turn the knob on the top of the DaToo aquarium heater, You can easily get the temperature you want（68 to 93°F) and you can read the temperature you set by the dial of the aquarium heater. Thermostat system to ensure that your beloved fish can be happy and comfortable life
• Sturdy And Durable - Still worried about the heater will be broken?Now let's say goodbye to this worry. The shell of the DaToo Aquarium Heater is made with Shatterproof, Corrosion resistant, Wear-resistant microcrystalline glass(glass-ceramics), can be used in fresh water and salt water.The heating part is made of nickel-chromium alloy, ensure superior heat transfer and enhanced service life. Select DaToo Aquarium Heater, Let it serve your fish forever..
• BPA Free And Energy Saving - Every plastic component of the DaToo Aquarium Heater is made with durable, high-quality, BPA-free plastic. The process of heating does not produce invisible toxins. This means it is safe not only for your fishes, but for you as well. Stepwise heating mode, it will automatically turn on and off to keep your set temperature, reduce electricity consumption. Select DaToo Aquarium Heater, not only care about your fish, but also save electricity fee for you.
• Attention - This is 50W DaToo Aquarium Heater, 6.7inch, fit 2 to 10 gallons tank with hoods or glass canopies and keep the water flowing( This is very important).Please confirm these details before purchase. Select DaToo Products= Own A Private Aquarium Housekeeper.

DaToo

• UPGRADED MORE DURABLE VERSION: Provided the best warm area to your fish in the cold winter.Keeps improving best aquarium heater for your fish tank, after collecting so many comments from customers, we upgrade its function and life time, now it works more continuously and accurately.
• MORE SAFETY & HIGH QUALITY: This upgraded aquarium heater now updated for more durable Quartz Glass, which is pretty shatter-proof and blast-proof and prevents electricity leakage. And the stronger protective container updated for Anti-melting anti punching double sealed material, it is scald-preventing for your pets and your safety.
• FREE THERMOMETER: This fish tank heater come with an extra thermometer to show the accurate tank temperature to avoid overheat or freeze. It provide a constant warm environment for your pet fish to stay healthy, suitable both for fresh and salt water.
• TEMPERATURE CONTROL: Aquarium heater works in intermittent operation mode and will automatically turn on/off to achieve the setting temperature constantly and stably. Setting the temperature by the red knob on the top with range is 64°F - 94°F.High accuracy(±1°F)
• APPLICABLE TANK SIZE: Our submersible aquarium heaters are perfect designed for different size tank, 50W for 5-10 gallon; 100W for 10-30 gallon; 300W for 30-85 gallon, please choose the suitable power for your tank. And we also recommend to position it near a strong water flow, the outlet of a power filter is ideal, so that the whole aquarium are in the same temperature.

FTSTC