FREESEA Aquarium Heater for Fish Tank: Stable Temperature Maintains 78°F | 25W Worry-Free Heating via Dry Run Protection for 1–5 gal Betta Turtle & Saltwater Tank

From the brand

FREESEA is a brand that specializes in aquatic products, aiming to provide high-quality products for fish farming enthusiasts.

At FREESEA, we believe that fishkeeping is not just a hobby, but a way of life. Our team of experts are passionate about aquatic life and are committed to providing customers with the best products and advice to help them achieve success in their fishkeeping journey.

Automatic Fish Feeder

Aquarium Pump

Aquarium Heater&Fish Tank

Aquarium Wave Maker

More Aquarium Product

More Product

How did we get our start?

The FREESEA team was started in 2005. We have been in the field of aquarium for more than ten years with the most professional team and first-class after-sales service.

What makes our products unique?

We have our own R&D team and factory. Each product is independently developed and designed by our team, and has applied for a patent, which is unique in the market.

What problem are we solving?

FREESEA products are rigorously tested and used for a long time before being available in bulk. We focus on providing quality products and services.

Package Dimensions ‏ : ‎ 7.72 x 2.99 x 1.85 inches; 1.45 ounces
Item model number ‏ : ‎ FS01
Date First Available ‏ : ‎ December 25, 2025
Manufacturer ‏ : ‎ FREESEA
ASIN ‏ : ‎ B0GCHQNPCM
Best Sellers Rank: #89,901 in Pet Supplies (See Top 100 in Pet Supplies) #174 in Aquarium Heaters
Customer Reviews: 4.2 4.2 out of 5 stars (22) 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); } }); });
【Constant Temp & Auto Shut-off】Features high-quality magnesium oxide filling for even heat distribution and anti-leakage protection, maintaining a constant 78°F (±2°F). Top sensor auto shuts off when 2 inches out of water, eliminating overheating or dry burn risks, offering a stable aquatic environment for your pets.
【Ideal for Enthusiasts & Small Tanks】Designed for 1-5 gallon small fish tank, perfect for home, office, or fish stores. Suitable for betta, goldfish, turtle, and reef tanks, delivering reliable heat without occupying space or disrupting scenery.
【Shatterproof & Compact Design】Features explosion-proof quartz glass core and smooth PC cover, more compact and safer than ordinary glass heaters. Prevents cracking and burns, suitable for freshwater community tanks and corrosive saltwater environments.
【Dual Protection for Trust】Combines auto-constant 78℉ and water-out auto shut-off, plus protective cover, directly addressing “cooking fish” or “glass burst” fears. Proven safety for betta, turtles, and sensitive corals.
【Easy Setup & Worry-free Warranty】Includes UL certified 4.9ft power cord, 2 strong suction cups, 2 thermometer stickers for quick installation.1 year warranty, your satisfaction and the ecological stability of the fish tank are our primary goals, making your choices simple and risk-free.