Price: $17.08
(as of Jan 16, 2026 20:10:33 UTC – Details)
Introduction to the Betta Slim Heater
The Betta slim heater is designed to provide your fish with a healthy life by maintaining the ideal water temperature. This innovative product is specially designed with a positive thermal coefficient element that heats the water in your bowl, aquarium, or terrarium to an average of 5 to 10 degrees warmer than room temperature.
Features
- Specially designed for use in glass, plastic, or acrylic tanks with fresh or salt water.
- Ideal for creating a livable environment for Betas, Glowfish, and many other kinds of fish and reptiles.
- The slim heater can increase the water temperature of mini aquariums up to 10 gallons by a few degrees compared to the ambient room temperature.
- Safe to use under gravel and in various tank materials.
- Plug and Play universal fish tank heater with no temperature setting required.
Product Specifications
- Product Dimensions: 3 x 0.25 x 3 inches; 3.2 ounces
- Item Model Number: T20101
- Date First Available: November 10, 2011
- Manufacturer: Hydor USA, Inc.
- ASIN: B006JVQ67K
- Best Sellers Rank: #46,374 in Pet Supplies, #117 in Aquarium Heaters
- Customer Reviews: 4.0 out of 5 stars (1,823 reviews)
Pros
- Easy to use and install with a plug-and-play design.
- Suitable for small tanks (2 to 5 gallons) and does not take up much space.
- Can be submerged in water or placed under tank gravel.
- 90-degree angle design makes it ideal for Betta aquariums.
- Suitable for both fresh and saltwater environments.
Cons
- Not suitable for environments without water.
- No temperature control setting, which might be a drawback for some users.
- Limited to heating water a few degrees above room temperature, which may not be sufficient for all types of fish or environments.
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