FREESEA Aquarium Heater for Fish Tank: 50W Small Submersible Thermostat with Off-Water Protection & UL Certified Cord for 3-10 Gallon Fish Turtle Tanks Enthusiasts

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 3.03 x 0.67 inches; 9.52 ounces
Item model number ‏ : ‎ FS01
Date First Available ‏ : ‎ October 13, 2025
Manufacturer ‏ : ‎ FREESEA
ASIN ‏ : ‎ B0FVWZ26SD
Best Sellers Rank: #71,612 in Pet Supplies (See Top 100 in Pet Supplies) #145 in Aquarium Heaters
Customer Reviews: 4.5 4.5 out of 5 stars (11) 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); } }); });
Tropical Fish & Betta Keepers: Worried about sudden temperature drops in your 3-10 gallon tank stressing or even harming your fragile aquatic pets? Our preset 78°F thermostat maintains a safe, stable paradise.
From Temperature Swings to Precision Stability: Erratic fluctuations cause stress and illness → Preset thermostat & accurate thermometer maintain perfect warmth for active, healthy fish.
From Anxiety to Peace of Mind: Stop constantly worrying and checking the tank. Our heater with advanced Off-Water Protection automatically shuts off for safety, giving you confidence and allowing you to simply enjoy the beauty of your aquarium.
Ideal for a wide range of setups: Betta bowls, nano shrimp tanks, desktop aquariums in offices, or hospital tanks for sick fish. Its compact, fully submersible design fits discreetly in any small aquatic environment.
Certified Safe & Reliable: Backed by UL/SGS certification and crafted with shatterproof quartz glass. A proven choice trusted by thousands of aquarists.