Aquarium Heater for 40-55-75 Gallon, 300W Submersible Fish Tank Water Heater with Accurate Temperature Control, Over-Temp Protect, Auto Shut-Off, Quick Heat up for Saltwater & Freshwater

Price: $24.21 - $22.99
(as of Oct 06, 2025 10:30:23 UTC – Details)

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Gifts for Aquarium Lovers and Fish Keepers

There are many people who love aquariums and fish, but also those who don’t know much about them.

If you have a friend who loves fish and you are looking for gifts for aquarium lovers but doesn’t know where to get started, this list is perfect for you!

Whether you’re a seasoned aquarist or a beginner, our aquarium series promises to create a thriving aquatic world, where life flourishes in perfect harmony！

Heaters and Aquarium Light

Planted Aquarium Light

How start?

We started this aquarium series with a passion for creating innovative, reliable products that cater to the needs of aquatic enthusiasts.

What makes our unique?

Our products are unique for their blend of advanced technology, safety design, and a deep focus on enhancing the beauty and health of aquariums.

Are our goods of the quality?

Yes, our products are of the highest quality, built with premium materials and strict attention to detail. Each item undergoes rigorous testing to ensure long-lasting performance and reliability, providing customers with peace of mind for their aquariums.

Package Dimensions ‏ : ‎ 15.67 x 4.61 x 2.52 inches; 1.32 Pounds
Item model number ‏ : ‎ heaters
Date First Available ‏ : ‎ March 28, 2024
Manufacturer ‏ : ‎ AHJ
ASIN ‏ : ‎ B0CZ9FH98P
Best Sellers Rank: #16,800 in Pet Supplies (See Top 100 in Pet Supplies) #27 in Aquarium Heaters
Customer Reviews: 4.4 4.4 out of 5 stars 296 ratings 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); } }); });

🐟🌡️[Accurate Temperature Control +-1 °F] 🐟 It ensures the water temperature is accurate at the setting temperature +-1°F. Different from others, thanks to the integrated design in which the PID temp-chip and nickel-chromium wires are connected directly. When the AHJ aquarium heater is in the water, it could detect the real temperature super fast and make regulations quickly. Ensure a stable and warm water comfortable for your aquatic fishes, betta, turtle
🐟🌡️[Upgrade Intelligent Safety Protection] 🐟Protection against overheating, Over-temperature, and lack of water protection, Anti-dry burning functions. Safeguard your fish and aquarium with advanced safety measures. When the water temperature exceeds 94℉, the LCD digital display will display HH and keep flashing to remind. When the digit heater detects the fish tank’s lack of water, it will auto-shut off
🐟🌡️[Heating Fast & Keeps Stable] 🐟Enjoy fast and efficient heating with the AHJ aquarium heater. Quick temperature adjustment, hassle-free setup. Experience rapid heating for your 40-70 gallon (recommend 300 watts). If you are not sure which size and watt suits your fish tank, please measure the L W H, and contact our customer service
🐟🌡️[External Controller Easy to Use] 🐟The heater must be fully submerged to work properly. Conveniently adjust settings by the external controller without wetting your hands. Press the setting button, the thermometer will change 1℉(63℉-93℉) cycle setting. Red LED light on means the heater working and the water is heating. Blue LED light on means the water temperature is kept constant. Very convenient to read and compare the temperature from LCD screen
🐟🌡️[High Quality with Longer life span] 🐟Before the digital aquarium heater delivery, we have 100% conducted a 72-hour heating test in water to ensure the safety of the product. Using a thick quartz tube, 1.5m/4.75 ft cable(U.S. UL Certified), high temperature resistant protective case which Prevents water plants from adhering to the quartz glass wall and protects small fish not touching the quartz tube