--- product_id: 450366074 title: "T300 Fully Electronic Heater for Freshwater Aquariums up to 80 Gal." brand: "fluval" price: "€ 124.09" currency: EUR in_stock: true reviews_count: 6 category: "Fluval" url: https://www.desertcart.hr/products/450366074-t300-fully-electronic-heater-for-freshwater-aquariums-up-to-80 store_origin: HR region: Croatia --- # 300W powerful heating Precise 72-90°F adjustable range 360° heat mode indicator ring T300 Fully Electronic Heater for Freshwater Aquariums up to 80 Gal. **Brand:** fluval **Price:** € 124.09 **Availability:** ✅ In Stock ## Summary > 🔥 Keep your aquatic world perfectly cozy with Fluval T300 – where precision meets peace of mind! 🌊 ## Quick Answers - **What is this?** T300 Fully Electronic Heater for Freshwater Aquariums up to 80 Gal. by fluval - **How much does it cost?** € 124.09 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/450366074-t300-fully-electronic-heater-for-freshwater-aquariums-up-to-80) ## Best For - fluval enthusiasts ## Why This Product - Trusted fluval brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Custom Comfort:** Large grip dial lets you easily dial in the perfect temperature between 72-90°F (22-32°C). - • **Flexible Placement:** Fully submersible and mountable vertically or horizontally to fit your aquarium setup seamlessly. - • **Precision Perfected:** Advanced electronic design ensures stable, accurate temperature control for your freshwater aquarium. - • **Safety First, Always:** Auto shut-off in absence of water plus Heater Guard protection prevents overheating and breakage. - • **Effortless Monitoring:** 360° LED ring glows red when heating and blue when optimal temperature is reached—visible from any angle. ## Overview The Fluval T300 is a 300-watt fully submersible electronic heater designed for freshwater aquariums up to 80 gallons. It features advanced temperature accuracy, 24/7 monitoring with a 360° LED indicator ring, and multiple safety mechanisms including automatic shut-off and Heater Guard protection. Its user-friendly large dial allows precise temperature adjustments from 72-90°F, making it a reliable and stylish choice for maintaining optimal aquatic environments. ## Description 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. Review: Showing 0.8 degrees less than it is but works perfectly - Excellent. Works perfectly. Review: I bought two of these for my 120 gallon. I always use two smaller heaters, because I've had many heaters stick on and I'd rather have an undersized heater making the tank warm, rather than have a "proper" sized heater cook fish. ## Features - 300-Watt heater designed for freshwater aquariums up to 80 Gal (300 L) with advanced electronic construction provides superior accuracy, stability and long-term performance - 24/7 monitoring regulates temperature and avoids large, unsafe fluctuations and 360° indicator light ring displays heat mode clearly from any angle (illuminates RED when heating function is engaged and BLUE when desired temperature is achieved) - In absence of water, the T-Heater automatically cuts power to prevent overheating and Heater Guard provides additional protection against breakage - Large grip dial easily adjusts water temperature from 72-90˚F / 22-32˚C - Fully submersible design allows for placement anywhere in aquarium either vertically or horizontally ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B1S7TY3J | | Allergen Information | Allergen-Free | | Batteries Included | No | | Best Sellers Rank | #24,524 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,199 in Aquarium Accessories | | Color | T300 | | Customer Reviews | 4.4 4.4 out of 5 stars (1,057) | | Date First Available | 31 May 2022 | | Item Weight | 450 g | | Item model number | 14884 | | Pet Life Stage | All Life Stages | | Product Dimensions | 12.45 x 12.7 x 4.32 cm; 450 g | | Quantity | 1 | | Size | T300 | | Specific Uses | Indoor | | Wattage | 300 watts | | batteries required | No | ## Images ![T300 Fully Electronic Heater for Freshwater Aquariums up to 80 Gal. - Image 1](https://m.media-amazon.com/images/I/71A3hgzL8PL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Showing 0.8 degrees less than it is but works perfectly *by I***S on 29 August 2025* Excellent. Works perfectly. ### ⭐⭐⭐⭐⭐ Review *by A***R on 8 November 2025* I bought two of these for my 120 gallon. I always use two smaller heaters, because I've had many heaters stick on and I'd rather have an undersized heater making the tank warm, rather than have a "proper" sized heater cook fish. ### ⭐⭐⭐⭐⭐ Review *by N***A on 27 August 2023* So far so good . Love the design. Simple , efficient. Has good features. Avoids problems like overheating, bursting and overall good product. ## Frequently Bought Together - Fluval T300 Fully Electronic Heater for Freshwater Aquariums up to 80 Gal. - PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic - Fluval FX2 High Performance Canister Aquarium Filter - Multi-Stage Filtration, Built-in Powered Water Change System, and Basket-in-Basket Tray Design --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/450366074-t300-fully-electronic-heater-for-freshwater-aquariums-up-to-80](https://www.desertcart.hr/products/450366074-t300-fully-electronic-heater-for-freshwater-aquariums-up-to-80) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-05*