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The Fluval T Series submersible heaters combine electronic accuracy, reliable monitoring and several safety features to maintain desired water temperatures with convenience in mind. Five model sizes are available to accommodate today’s most popular aquarium sizes.
For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology – a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.
Dusty Rhodes
Reviewed in the United States on September 28, 2024
I purchased the T300 in April this year. In September I noticed the pilot light was almost to dim to see, Looked like a burning ember. I questioned FLUVAL customer service with a picture. They told me to cut the electrical cord and send a picture of the disabled heater and a photo of the heater label and a photo of my receipt. Since I bought it through AMAZON I had POP. Within a couple days I had a box at my door with a new T300 heater. Now that is service.
James Sanders
Reviewed in the United States on September 1, 2024
Does its job flawlessly.
Maria Thorne
Reviewed in the United States on August 12, 2024
I have been using this for 14 months with no issues it holds a good temp. What is more impressive is the Saftey off…. I drained the tank today while distracted and forgot to unplug the heater… I thought it was toast, but to my surprise it is functioning fine and it holding at perfect temperature after re filling the tank. That feature alone would warrant a repurchase if I am in need of another.
Raul E Maldonado
Reviewed in the United States on March 22, 2024
Nothing negative to say. It is a really well designed unit and pretty much disappears in my aquarium. Was easy to adjust temperature as well as the indicating light is way better knowing it is working properly even when it isnt actually heating. My future aquariums will have this series heaters from now on.
Derrick A. Mayoleth
Reviewed in the United States on February 27, 2024
It is generally known that aquarium heaters of most brands are hit-n-miss these days, so I went for the Fluval T300s for our 75-gallon tank. The first one wouldn't hold the temperature steady within even 10 degrees. The second one just quit working. We sent the first one back. Since the second one lasted just past 30 days, we can't get a return for a refund or replacement through Amazon. It's possible we got 2 duds in a row, but it's just as possible that these were just poor-quality heaters. Update: After reaching out to Fluval, they did exchange the second heater, so credit to them for backing up the product.
Dromedary
Reviewed in the United States on December 31, 2024
My cichlid cracked the base of the original while she attempted to attach her reflection. A wild girl and fortunately not hurt. It worked perfect for over 3 years. Excellent and easy temperature control.
Dave Anderson
Reviewed in Canada on December 30, 2024
I'm using it hooked up to a temp controller and works perfectly.
Terry Glancy
Reviewed in Canada on November 5, 2024
looks nice and works great I like the color indicatorvery goexcellentt
Miguel Angel Guizar Santiago
Reviewed in Mexico on November 10, 2024
Esta marca es excelente, yo tengo varios años con filtros externos de canasta de esta marca es muy buena, totalmente la recomiendo, pero esta vez tuve que reemplazar el calentador de mi acuario y vi esta opción, la cual está excelente también, muy práctica es exacta en las temperaturas que maneja.
Neha
Reviewed in Germany on August 27, 2023
So far so good . Love the design. Simple , efficient. Has good features. Avoids problems like overheating, bursting and overall good product.
Dillon Kentworth
Reviewed in the United States on March 8, 2023
I’m a believer in mild overkill when it comes to heaters because I like to keep my house cold. I got the 300 watt heater for a 55 gallon tank. In 3 hours it safely took my (new, uninhabited) tank from 67 to 78 degrees. I like the (mostly) black design that blends into my painted black tank background and the aesthetically pleasing light ring that displays whether it is currently heating or not. The adjustment dial seems to have a lot of little notches if not a continuous spectrum of temps to choose from. One minor annoyance was that when I pulled the product out of the box, the black heater guard that goes on the end was stuck in a bit of styrofoam way down in the bottom of the box. I almost threw the box away and assumed I’d just gotten one without all the pieces. Then when I applied it to the already-wet heater, it popped off a couple of times. It’s not strictly necessary for my needs since my heater is safely tucked away in a vertical position where fish can’t get to it, but still, watch out for that.
Vigo X
Reviewed in France on November 23, 2023
Dégoûté, j'attends avec impatience ce chauffage car le mien est très irrégulier, déjà il n'arrive pas au moment marqué sur le site Amazon, après il est perdu , après il part à la poste , et finalement quand j'ai réussit à le récupérer, il a une prise ANGLAISE 😑😑😑😑‼️Donc je doit attendre encore 3 jours pour avoir un adaptateur, bravo prime ‼️Pour le produit, c'est a voir dans le temps mais il semble résistant à la première vue .
Jason B
Reviewed in the United States on August 4, 2022
This heater almost killed my fish, it would not heat a 30 gallon tank. I tried everything following the directions to the T, would not heat at all. The fluval m series works great compared to this one.
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