Finnex THD-500S Compact Titanium Heating Element (500 Watt) – Finnex

Ensure optimal thermal stability for your larger aquatic systems with theFinnex THD-500S Compact Titanium Heating Element. Designed for serious hobbyists, this 500-watt heating tube combines the durability of titanium with a streamlined, space-saving design, making it a superior alternative to traditional glass heaters.

Despite its high power output, the THD-500S maintains a slim0.62″ diameter, allowing it to fit into tight sump chambers and filtration compartments where bulkier heaters fail. Whether maintaining a reef tank or a large freshwater display, this element delivers rapid, even heat transfer to keep your water parameters stable.

⚠️ Important:This is a heating element only. A separate temperature controller (sold separately) isrequiredfor operation.

Key Features

• Corrosion-Resistant Titanium:Constructed from premium titanium, this unit is virtually unbreakable and completely immune to saltwater corrosion.
• Ultra-Compact Profile:The slim0.62″ diameterallows for flexible placement in crowded sumps or AIO back chambers without sacrificing power.
• High Efficiency:Titanium transfers heat more effectively than glass, ensuring your aquarium reaches the target temperature quickly with minimal energy waste.
• Safety Guard Included:Comes equipped with a high-temperature heater guard to protect livestock and equipment from direct contact with the heating element.
• Broad Compatibility:Designed to work with most standard 3-prong aquarium temperature controllers (e.g., Finnex, Inkbird, Ranco).

Detailed Description

Heavy-Duty PerformanceThe THD-500S is built to handle the demands of larger systems, rated for aquariums between70 and 125 gallons. Its titanium body withstands the bumps and scrapes of regular maintenance that would shatter glass heaters, providing peace of mind for long-term use.

Engineered for SafetyEvery unit includes a snap-on protective guard. This essential feature prevents fish, snails, and other inhabitants from suffering burns while ensuring water flows freely around the element for accurate thermal regulation.

Precision & StabilityWhen paired with a reliable controller, the THD-500S eliminates dangerous temperature swings. Its internal industry-standard quartz sleeve ensures steady, consistent heat output, promoting a stress-free environment for sensitive corals and tropical fish.

Technical Specifications

• Model:THD-500S
• Wattage:500 Watts
• Recommended Tank Size:70 – 125 Gallons
• Voltage:120V
• Amps:4.5 A
• Tube Diameter:0.62 inches (Slim Profile)
• Approx. Length:~12.5 inches
• Material:Titanium & Quartz
• Application:Freshwater & Saltwater

What’s In The Box

• 1x Finnex THD-500S Titanium Heating Tube
• 1x Protective Heater Guard
• Suction Cups for mounting

Please Note:This unit doesnothave a built-in thermostat. It must be plugged into a heating controller to function safely. Do not plug directly into a wall outlet.