Aquarium Heater 300W/1000W, Submersible Fish Tank Heater with Digital LED Controller and Intelligent Leaving Water Automatically Stop Heating System, for Freshwater and Saltwater

Product description

What are the advantages of the variable frequency heating design?

This variable-frequency aquarium heater auto-adjusts power. As a practical fish tank heater and turtle heater, it heats quickly and maintains steady temperature. It stabilizes water temp, reduces aquatic pets’ stress and saves energy.

How precise is the temperature detection with dual sensors?

Equipped with dual probes for high precision, this turtle tank heater & water heater for turtle tank features ±0.2°C/±0.3°F accuracy. It triggers an E2 alarm and powers off if one probe fails, effectively protecting turtles and fish from overheating

What material is this fish tank heater made of?

This durable aquarium heater adopts heat-resistant ABS shell, nickel-chromium heating wire and thickened quartz glass. Sturdy and non-deformable, it serves perfectly as a long-lasting fish tank heater and turtle heater.

What safety protection modes does this heater have?

This water heater for turtle tank has 3 smart protection modes: HH over-temperature, E1 off-water & E2 sensor failure alarm. The automatic power-off design keeps your fish and turtles safe.

How should I properly place and use this submersible heater?

This submersible turtle heater supports vertical and horizontal installation. It must be fully submerged in flowing water to avoid temperature stratification, suitable for all wattage options for stable and even heating.

Package Dimensions ‏ : ‎ 14.84 x 7.91 x 2.52 inches; 2.31 Pounds
Date First Available ‏ : ‎ February 6, 2026
Manufacturer ‏ : ‎ HarmonyHome
ASIN ‏ : ‎ B0GHM482G2
Best Sellers Rank: #92,850 in Pet Supplies (See Top 100 in Pet Supplies) #180 in Aquarium Heaters
Customer Reviews: 4.7 4.7 out of 5 stars (21) 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); } }); });
【Ai Variable-Frequency Aquarium Heater】The HarmonyHome 300W Fish Tank Heater can be applicable to approx. 30-55 gal tank, This heater for fish tank will adjust its power according to the temp in the tank. When the water temp in the tank differs significantly from the set temp, the heater will quickly bring the water up to temp. When the water temp in the aquarium is close to the set temp, the heater will work at a lower power to heat up gently and consistently. This saves electricity and avoids sudden temp fluctuations that can cause stress to aquatic life. Please ensure the heater is fully submerged vertically in the aquarium water, or horizontally in the terrarium water.
【Dual-Sensing Temperature Probe Design】This design enables more precise temperature control: Temperature control range 59-93°F/15-34°C, accuracy ±0.3°F/0.2°C. The design is basedon independent temperature collection and mutual supervision mechanism. lf any probe fails, the aquarium heater will immedi-atelyflash an “E2″alarm. At the same time, the circuit is disconnected toensure that it will not over-temperature, That can effectively prevents the “cooking the fish” phenomenon that occurs when temperature sensors malfunction.
【Premium Safety & Durability】The durable material of the turtle tank 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 thickened quartz glass.
【Intelligent power cut-off, Comprehensive Protection】This heater has a unique intelligent water and temperature sensor system, providing comprehensive protection: ①Over-temperature alarm: When water temperature exceeds the targe temperature, it shows “HH” and automatically stops heating. ②Off-water alarm: When the water level is lower than aquarium heater’s water level, it flashes “E1” and automatically stops heating. ③ When any one of the temperature sensors malfunctions, it shows “E2″and automatically stops heating.
【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. 3. Aquarium heaters should be placed in flowing water, otherwise temperature stratification will occur.
【Guaranteed Customer Service】HarmonyHome 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.