50W Titanium Aquarium Heater with LED Digital Display & External Controller – Submersible Fish Tank Heater, Precise ±1.8℉, IP68 Waterproof, for 3-7 Gallon Freshwater & Saltwater Tanks

From the brand

Oasirep

A warm home for every fin.

Warmth below the waves.

About Oasirep

At Oasirep, we believe every aquarium holds more than water — it holds life, warmth, and quiet companionship.

From tropical bettas to playful turtles, we design every heater with precision and heart, combining smart control with gentle protection. Because caring for fish isn’t just a hobby — it’s a bond built on trust, warmth, and love beneath the water’s surface.

You Can Trust

Designed with care, built in certified facilities, and tested to meet international environmental and performance standards.

Package Dimensions ‏ : ‎ 11.6 x 3.15 x 1.77 inches; 10.75 ounces
Item model number ‏ : ‎ HL-299T-50W
Date First Available ‏ : ‎ October 21, 2025
Manufacturer ‏ : ‎ Oasirep
ASIN ‏ : ‎ B0FX4G9DN5
Best Sellers Rank: #101,534 in Pet Supplies (See Top 100 in Pet Supplies) #190 in Aquarium Heaters
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【Precise Temperature Control】 Featuring a proprietary “Oasirep IC” chip, the 50-watt aquarium heater keeps water temperature accurate (±1.8℉ / ±1℃) and allows you to set a target temperature from 68℉–93℉ / 20℃–34℃, with a 3s long press to switch between Fahrenheit and Celsius. Perfect for 3-7 gallon fish tanks.
【Safe & Auto Shut-Off】 Featuring a high-precision water level sensor, the heater for fish tank automatically shuts off when water drops below the sensor line (E1 alert), preventing dry burn and protecting your fish. Always keep the heater fully submerged during use.
【Durable & Explosion-Proof Titanium】 Made from premium Grade 2 titanium with a Teflon coating, this submersible fish heater resists corrosion and impact, explosion-proof design for added safety, ensuring long-lasting performance in freshwater or saltwater tanks.
【Energy Efficient & Auto Heating】 Featuring smart temperature control, the heater for aquarium stops heating when the preset temperature is reached and automatically resumes when water drops 1.8℉ / 1℃ below, ensuring energy-efficient operation. Clear LED display shows water temperature at a glance.
【Controller & Indicator Guide】 External controller with a “SET” button lets you cycle through temperature settings. After selecting, wait 5s for confirmation, then display shows real-time water temperature. Red light = heating, blue light = reach the set temperature. Built-in over-temperature protection stops heating above 98℉ / 35℃ (E2 alert).
【Complete Package & Cord Length】 50-watt adjustable aquarium heater ×1, suction cups ×2, user manual ×1. Power cord length: 5.25-ft (1.6 m) for flexible placement.
【Safety Notice】 When removing the heater from the aquarium, do not touch the heating tube. Place it carefully on a stable, non-contact surface to prevent burns.