--- product_id: 15578561 title: "Marina Submersible Aquarium Heater 300 Watt" brand: "marina" price: "1691787₫" currency: VND in_stock: true reviews_count: 13 url: https://www.desertcart.vn/products/15578561-marina-submersible-aquarium-heater-300-watt store_origin: VN region: Vietnam --- # Fully submersible & waterproof 300W powerful heating Impact-resistant glass Marina Submersible Aquarium Heater 300 Watt **Brand:** marina **Price:** 1691787₫ **Availability:** ✅ In Stock ## Summary > 🔥 Keep your aquatic world perfectly cozy and safe — no fish left behind! 🐠 ## Quick Answers - **What is this?** Marina Submersible Aquarium Heater 300 Watt by marina - **How much does it cost?** 1691787₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/15578561-marina-submersible-aquarium-heater-300-watt) ## Best For - marina enthusiasts ## Why This Product - Trusted marina brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust 300W Power:** Effortlessly maintain optimal warmth for aquariums up to 80 gallons. - • **Durable Safety Design:** Impact-resistant glass and waterproof sealing ensure long-lasting, safe operation. - • **Fish-Friendly Protection:** Bumper guard prevents accidental harm, keeping your aquatic friends safe. - • **Hassle-Free Installation:** Includes suction cup bracket for secure, no-fuss mounting anywhere in your tank. - • **Precision Temperature Control:** Easily set and monitor aquarium temps with a clear dial and pilot light indicator. ## Overview The Marina Submersible Aquarium Heater 300 Watt delivers reliable, precise heating for fresh or saltwater tanks up to 80 gallons. Featuring impact-resistant glass, waterproof sealing, and an easy-to-use temperature dial with pilot light, it ensures safe, durable, and convenient operation. Comes with a suction cup bracket for secure installation and a bumper guard to protect your fish. ## Description Powerful 300-watt Marina Submersible Aquarium Heater provides reliable heating for fresh or saltwater aquariums up to 80 US gallon aquariums. The heater includes many practical features for easy use, safety and convenience, including an easy-to-access temperature set dial, on/off pilot light indicator and a bumper guard for fish safety. Made of durable high-impact glass, it's built to last under normal aquatic conditions. ## Features - Submersible heater for fresh or saltwater aquariums or reservoirs - Easy to read temperature settings - Impact-resistant glass design; Water proof sealing - Includes bracket with suction cups for easy, secure installation - Length: 10.6 Inch ## Product Details - **Brand:** Marina - **Special Feature:** Light Up - **Form Factor:** Dish - **Indoor/Outdoor Usage:** Outdoor - **Recommended Uses For Product:** Aquarium ## Images ![Marina Submersible Aquarium Heater 300 Watt - Image 1](https://m.media-amazon.com/images/I/51ZH3NDUedL.jpg) ## Available Options This product comes in different **Size, Product Packaging** options. ## Customer Reviews ### ⭐⭐⭐ 3.0 out of 5 stars Not reliable *by J***Y on Reviewed in the United States on January 13, 2019* Using the 200watt version in a hooded 45 gallon tank. As many have noted the temperature dial is not accurate, so I wasn't expecting trial and error to get the temperature exact. What I wasnt expecting was the drift or equilibration time.My goal is to keep the water 79-80°. I Set this to 79 degrees which got my tank to 76.5° after 24hours. After a few days of trial and error, setting the dial to 83° got the water to reach 79.5°. But for some reason the water went up about 0.5°/week. When it reached 81°, I spent several days turning it down a little at a time. Til I got setting the dial to 81.5° got my temp to 79.5°, stayed there for another week, then slowly dropped 77°.After almost 2 months I officially give up, I put in my tetra 150watt heater, that heater is preset to 78° my temps stay between 77.5° and 78°. I only check the temps 2-3 times a day, maybe this marina heater fluctuates like crazy through the day, I never had a heater that fluctuates this much (including the unbranded cheap HOB that this heater was replacing ) ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Better than Tetra *by C***R on Reviewed in the United States on August 18, 2022* I've had so many Tetra heaters end up in an early grave, it was actively driving me to loathe Tetra. Aqueon was similarly disappointing. This is going on 6 months and no heater death yet! I'm hopeful. ### ⭐⭐⭐⭐ 4.0 out of 5 stars It’s not fancy but, it’s lasted 2+ years for me and still going. *by J***S on Reviewed in the United States on May 26, 2020* It’s decent. I’ve had mine a couple years now. I even took it out the tank and it sat in the shed for a year and now I put it back in and it still works. I’m surprised with the longevity after being in the shed.Adjustment is stiff which is nice so It won’t creep without you knowing but, requires both hands to make sure it don’t pull off the glass when adjusting. --- ## 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.vn/products/15578561-marina-submersible-aquarium-heater-300-watt](https://www.desertcart.vn/products/15578561-marina-submersible-aquarium-heater-300-watt) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-23*