DaToo 300W Adjustable Knob Aquarium Heater Submersible Fish Tank Heater with Digital Thermometer for Saltwater and Freshwater Tanks

The Best fish tank heater with digital thermometer for Your Needs
Specification:
Rated power:300W
Rated voltage: AC 110~120V/60Hz
Cable Length: 3.94 ft
Heater Adjustable Temperature Range: 65-89°F (18-32°C)
Thermometer temperature Range: -58°F to +158°F (-50°C to +70°C)
Temperature Measurement Accuracy: ±1°C
Heater Mounting Method: 2 Strong Suction Cups
Digital Thermometer Accessories: 2* Pack Suction Cup, 1* LR44 batteries
Applicable Tank Size: 50-70 Gallon Saltwater and Freshwater Fish Tanks
Features:
– Precise Smart Temperature Control
– Safe and Durable
– Easy Operation
– Dual Monitoring
– Safety Instructions
– One-Year Warranty
Note:
Simply immerse the thermometer probe in the water; do not immerse the entire thermometer.
Why I chose DaToo Knob-Style Fish Tank Heater ?
1. Precise Smart Temperature Control: The top knob can adjust the water temperature from 65–89°F. A smart sensor chip ensures precise temperature regulation; a red light indicates that the unit is heating, and when the light turns off, the set temperature has been reached.
2.Safe and Durable: Utilizing high-quality nickel-chromium heating wire and thickened glass tube, it is corrosion-resistant and impact-resistant, comes with a CE-certified 3.94ft sufficient length power cord to meet various placement requirements. The double suction cups provide stable fixation.
3.Easy Operation: Before powering on, simply rotate the knob to set the target temperature, then use the included suction cup to securely attach it to the tank wall, and it will start working automatically.
4.Dual Monitoring: Combined with an independent digital thermometer that displays the water temperature in real time, achieving dual monitoring of heating and temperature measurement. The change in water temperature is clearly visible.
5.Safety Instructions: When using, make sure the heater is fully submerged in water and the power plug is above the water surface. Before removing, allow it to cool for 15 minutes. Do not touch the hot glass tube. It is recommended to use a water pump or filter to maintain water circulation to ensure more uniform heating and stable temperature.
We offer a one-year warranty and 24-hour professional customer service. Buy with confidence!
Select DaToo Products= Own A Private Aquarium Housekeeper
JUST DO IT, Let’t Go!!

Package Dimensions ‏ : ‎ 13.82 x 3.23 x 1.85 inches; 10.23 ounces
Item model number ‏ : ‎ LR44
Date First Available ‏ : ‎ April 28, 2026
Manufacturer ‏ : ‎ DaToo
ASIN ‏ : ‎ B0GYS4RWPK
Best Sellers Rank: #27,855 in Pet Supplies (See Top 100 in Pet Supplies) #59 in Aquarium Heaters
Customer Reviews: 4.8 4.8 out of 5 stars (23) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
【DaToo 300W Aquarium Heater】: Are you still troubled by the inaccurate temperature control of the aquarium and the hassle of maintenance? DaToo heater comes with a separate digital thermometer and is designed for 50-70 gallon tanks. It precisely controls the temperature and offers dual monitoring, effectively solving the problems in breeding. It is easy for beginners to operate, significantly improving the stability of use, and makes temperature control worry-free and maintenance more efficient.
【Precise Smart Temperature Control】: The top knob can adjust the water temperature from 65–89°F. A smart sensor chip ensures precise temperature regulation; a red light indicates that the unit is heating, and when the light turns off, the set temperature has been reached. No frequent calibration is required, and the water temperature is stable in real time, providing an ideal environment for aquatic life such as fish, turtles, and shrimp, thereby reducing stress and the incidence of disease.
【Safe and Durable】: The DaToo fish tank heater utilizing high-quality nickel-chromium heating wire and thickened glass tube, it is corrosion-resistant and impact-resistant, suitable for freshwater, seawater, turtle tanks and betta fish tanks. Configuration: 3.94ft extended power cord, allowing flexible wiring and meeting various placement requirements. The double suction cups provide stable fixation, are easy to install, durable and long-lasting, and offer better value for money.
【Easy Operation + Dual Monitoring】: The DaToo knob-type aquarium heater. Before powering on, simply rotate the knob to set the target temperature, then use the included suction cup to securely attach it to the tank wall, and it will start working automatically. Combined with an independent digital thermometer that displays the water temperature in real time, achieving dual monitoring of heating and temperature measurement. The change in water temperature is clearly visible.
【Safety Instructions & One-Year Warranty】: When using, make sure the heater is fully submerged in water and the power plug is above the water surface. Before removing, allow it to cool for 15 minutes. Do not touch the hot glass tube. It is recommended to use a water pump or filter to maintain water circulation to ensure more uniform heating and stable temperature. We offer one-year warranty and 24-hour professional customer service. Buy with confidence!