Finnex Titanium Aquarium Heater, 500 Watt THD Series Standard, Heater Guard, Made in Taiwan (500W-Standard)

From the brand

How did we get our start?

Finnex started back in 1999 when a group of hobbyists decided they wanted to make high-performance equipment attainable to fellow fish keepers.

What problem are we solving?

Unlike overseas companies that start using inferior components over time after building their initial 5-star reviews, we’ve stayed in business for over 20 years by doing the opposite: upgrading components throughout the years instead of degrading them.

What makes our products unique?

We pack as much punch into our high-end Finnex products that make our customer’s aquariums and wallets happy.

Goals

Our goal is to educate fellow hobbyists on our quality LED & heater options to encourage positive growth within our aquatic hobby.

Results Driven

It’s not just a light – our LED series are a proven, stylish, plant-growing machine. Solid aluminum, grade components, Finnex quality.

Raffles, Giveaways, and Info!

Need help deciding on which Finnex products fits your tank best? Check out more Finnex lit tanks on most platforms @FinnexAquariums

Add quality to your aquarium

Package Dimensions ‏ : ‎ 20 x 5 x 5 inches; 8 pounds
Item model number ‏ : ‎ THD500
Date First Available ‏ : ‎ July 22, 2025
Manufacturer ‏ : ‎ Finnex
ASIN ‏ : ‎ B0FJGH9Y3D
Best Sellers Rank: #69,549 in Pet Supplies (See Top 100 in Pet Supplies) #122 in Aquarium Heaters
Customer Reviews: 5.0 5.0 out of 5 stars (1) 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); } }); });
Premium TAIWAN Titanium Build: Crafted with corrosion-resistant titanium for superior heat transfer and durability — perfect for both freshwater and saltwater aquariums. MADE IN TAIWAN.
Includes high-temp heater guard to protect fish, plants, and corals from accidental burns while enabling unrestricted water flow for stable temperature control.
Fully Submersible Design: Safe, submersible heater with advanced protection that delivers consistent, even heating while staying discreet and easy to install.
Trusted Finnex Quality since 2001: Backed by Finnex’s reputation for innovation and quality — upgrade your tank with a heater built to perform and last.
Suggested Water Volume: 70 – 130 Gallons *Rating for standard enclosed aquarium with a max heating capacity of ±8F above ambient room temperatures.