--- product_id: 2118461 title: "HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon" brand: "tetra" price: "965646₫" currency: VND in_stock: true reviews_count: 13 category: "Tetra" url: https://www.desertcart.vn/products/2118461-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2 store_origin: VN region: Vietnam --- # 50W precise heating power Built-in electronic thermostat at 78°F Dual indicator lights for heating status HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon **Brand:** tetra **Price:** 965646₫ **Availability:** ✅ In Stock ## Summary > 🔥 Keep your aquatic oasis perfectly cozy—effortless warmth, zero worries! ## Quick Answers - **What is this?** HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon by tetra - **How much does it cost?** 965646₫ 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/2118461-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2) ## Best For - tetra enthusiasts ## Why This Product - Trusted tetra brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Discreet & Compact:** Slim, submersible design hides seamlessly behind décor. - • **Safety-First Design:** Auto shut-off on electrical shorts keeps your aquatic friends safe. - • **Visual Heating Feedback:** Red and green indicator lights keep you in the know at a glance. - • **Universal Fit for Small Tanks:** Optimized for 2-10 gallon aquariums with easy vertical or horizontal installation. - • **Effortless Temperature Control:** Maintains a perfect 78°F automatically—no fiddling required. ## Overview The Tetra HT 50-Watt Submersible Aquarium Heater features a built-in electronic thermostat that maintains a consistent 78°F, ideal for tropical fish in 2-10 gallon tanks. Its compact, fully submersible design allows flexible installation, while dual indicator lights provide real-time heating status. Safety is prioritized with an automatic shut-off during electrical shorts. Trusted by over 16,000 users, this UL-listed heater combines reliability, ease of use, and sleek concealment for a flawless aquatic environment. ## Description Tetra® HT Submersible Heater is designed to keep your aquatic fish comfortable, with an electronic thermostat that automatically maintains a consistent water temperature of 78 degrees and prevents overheating, extending heater life. An indicator light lets you know when the water is heating (red light) and when it reaches the proper temperature (green light). Inside, silicon carbide crystals improve heat distribution and transfer. The strong glass tube is heat and shock resistant. This submersible heater is easy to use – just attach to the inside of the aquarium wall using the suction cup (included) in an area with good water circulation. The Tetra HT Submersible Heater is available in different wattages to fit your aquarium: use the 50-watt HT10 in 2 to 10 gallon aquariums; 100-watt HT30 for 10 to 30 gallons; 150-watt HT40 for 30 to 40 gallons; and 200-watt HT55 for 40 to 55 gallons. This heater is UL Listed. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need – from a large variety of quality fish food and innovative equipment to test kits and decor. Review: Solid Performance, Limited Flexibility - I have a few of these in use and haven’t had one fail yet. Most mainstream brands still use bimetallic strip thermostats in most of their aquarium heaters. These Tetra heaters use an electronic thermostat instead, which should reduce potential failure points by eliminating both the moving parts of a bimetallic strip, and the temperature control knob, which is a point on other heaters that can allow water ingress. On paper, that makes them a bit more robust than the traditional design. The main drawback is that these are fixed to around 78°F. If you need to run a tank hotter—into the mid-80s for disease treatment, for example—these won’t do the job. That said, for most people and most setups, these heaters are perfectly adequate, especially at the price point. If you need more flexibility or want extra peace of mind, I’d suggest looking at some of the heaters from Chinese brands with external digital controllers. Even better: pair your heater with an external temperature controller. That way, both the heater and the controller would need to fail at once to overheat your tank. Ideally, you’d run two smaller heaters, each on its own controller, to provide redundancy for both stuck-on and stuck-off failures. Of course, by the time you buy all that, you're looking at a setup that costs about six times more than one of these. So it really just comes down to where you want to land on the cost vs. risk spectrum. For a basic, inexpensive heater, these have done the job just fine for me. Review: Great little heater. - Works well. I was nervous at first because there was no device to see temperature but its not needed when you have a sticker thermostat. The speed of the temp rising was good to not shock my betta. It took about 24 hours to get to temperature. It had no smell when it started to heat up. It stuck right to glass with no issues, unlike ones I've had in the past, with other company's. When its time to clean it a quick wipe down will do the trick making keeping it clean very easy. It was smaller in size so not too thick and hides off to the side. ## Features - All Tetra HT heaters have indicator lights to let you know when the heater is on. It will be red when heating and green when the proper temperature has been reached..All Tetra HT Heaters will shut off if an electrical short is detected for your safety. - The HT10 uses a built in electronic theromstat to automatically maintain water at 78° F which is ideal for most tropical fish. No adjustment is requried. - Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies - The HT heater is fully submersbile and can be installed vertically or horizontally. It's small footprint makes it easy to conceal behind plants or other décor. - Please read all label information upon delivery. DO NOT plug heater into an electrical outlet until it is placed inside the aquarium. - All Tetra HT Heaters will shut off if an electrical short is detected for your safety. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000OQO69Q | | Best Sellers Rank | #7,612 in Pet Supplies ( See Top 100 in Pet Supplies ) #13 in Aquarium Heaters | | Brand | Tetra | | Brand Name | Tetra | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 16,716 Reviews | | Global Trade Identification Number | 00046798264477 | | Included Components | Aquaria 75026447: Tetra Submersible Aquarium Heater 50Wt | | Item Type Name | Aquarium Heater | | Item Weight | 7.84 ounces | | Manufacturer | Tetra | | Material | glass | | Material Type | glass | | Model Number | 26447 | | Part Number | AQ-26447 | | UPC | 046798264477 | | Unit Count | 1 Count | | Warranty Description | Two year warranty | | Wattage | 50 watts | ## Product Details - **Brand:** Tetra - **Color:** Black - **Item Weight:** 7.84 ounces - **Material:** glass - **Wattage:** 50 watts ## Images ![HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - Image 1](https://m.media-amazon.com/images/I/71CH35bZjVL.jpg) ![HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - Image 2](https://m.media-amazon.com/images/I/81zeKALepDL.jpg) ![HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - Image 3](https://m.media-amazon.com/images/I/71NRbk83Y-L.jpg) ![HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - Image 4](https://m.media-amazon.com/images/I/61IvRyE83GL.jpg) ![HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - Image 5](https://m.media-amazon.com/images/I/61fJ4zrsYaL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: would this work in a one gallon tank?** A: I wouldnt because the temp on this can go up to 79 degrees in a 10 gallon tank, for that reason i purchased a 10 watt for my 1 gallon tank and it keeps the tank at a perfect temp of 78. Check out the Marina C10 Submersible on Amazon for $10.00. **Q: Description says "the ht30 is adjustable between 72 degrees f and 85 degrees f". ok, why does the one i received say not adjustable, preset at 78?** A: All of the HT Heaters are preset now. Unfortunately, this is an old image and old description of the former HT 55. The description seems to have been translated to the HT 100 as well. Tetra is working to correct these issues immediately. We appreciate your bringing it to our attention. If you need any other assistance, please contact the Tetra Consumer Relations Team at 1-800-526-0650. **Q: Will this be okay in a 3 gallon betta bowl i'm making? if not any recomendations?** A: Yea i think so. I seriously look at this every day and im sooooooooooo glad i bought it. My betta looked so depressed before in his bowl because my house gets down to 60 degrees and his water was getting cold and now he is so happy his water stays 78 and he swims like a happy fish and has a lot of bubbles on top (means there happy). Its so crazy that warmer* water can make a fish soooo happy. This is a must. Yes buy it for a 3 gallon tank- i think it will work just fine and your fish will LOVE IT i promise! Let me know how it works out for you- because im so glad i got it! **Q: Does it turns off automatically** A: When it reaches the right temp. it automatically shuts off. When the light on it is green, it's heating; when the light is red, it's off ## Customer Reviews ### ⭐⭐⭐⭐⭐ Solid Performance, Limited Flexibility *by S***S on May 8, 2025* I have a few of these in use and haven’t had one fail yet. Most mainstream brands still use bimetallic strip thermostats in most of their aquarium heaters. These Tetra heaters use an electronic thermostat instead, which should reduce potential failure points by eliminating both the moving parts of a bimetallic strip, and the temperature control knob, which is a point on other heaters that can allow water ingress. On paper, that makes them a bit more robust than the traditional design. The main drawback is that these are fixed to around 78°F. If you need to run a tank hotter—into the mid-80s for disease treatment, for example—these won’t do the job. That said, for most people and most setups, these heaters are perfectly adequate, especially at the price point. If you need more flexibility or want extra peace of mind, I’d suggest looking at some of the heaters from Chinese brands with external digital controllers. Even better: pair your heater with an external temperature controller. That way, both the heater and the controller would need to fail at once to overheat your tank. Ideally, you’d run two smaller heaters, each on its own controller, to provide redundancy for both stuck-on and stuck-off failures. Of course, by the time you buy all that, you're looking at a setup that costs about six times more than one of these. So it really just comes down to where you want to land on the cost vs. risk spectrum. For a basic, inexpensive heater, these have done the job just fine for me. ### ⭐⭐⭐⭐⭐ Great little heater. *by A***A on December 30, 2025* Works well. I was nervous at first because there was no device to see temperature but its not needed when you have a sticker thermostat. The speed of the temp rising was good to not shock my betta. It took about 24 hours to get to temperature. It had no smell when it started to heat up. It stuck right to glass with no issues, unlike ones I've had in the past, with other company's. When its time to clean it a quick wipe down will do the trick making keeping it clean very easy. It was smaller in size so not too thick and hides off to the side. ### ⭐⭐⭐⭐⭐ Great little heaters *by J***H on November 2, 2025* Easy and uncomplicated, just the way I like it. Either as a standalone heater as in my 30 gallon tank or working in tandem on a thermostat as in my 55 gallon tank they are just dependable inexpensive heaters. I don't know how old my last one was before I replaced it but it had been used for a while before it came to me with the tank I bought and I was so impressed with it's dependability I replaced it with another. Funny thing is it never did fail, I was just being proactive as I didn't know it's age. These are my heaters now. I will say I did take the old suction cup and added it to the new heater. It would be nice if they came with two suction cups. ## Frequently Bought Together - Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic - Tetra Water Cleaner Gravel Siphon for Aquariums, Easily Clean Freshwater Aquariums --- ## 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/2118461-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2](https://www.desertcart.vn/products/2118461-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-06-03*