--- product_id: 19523632 title: "Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts" price: "$56.13" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.us/products/19523632-aqueon-aquarium-fish-tank-preset-heater-for-up-to-40 store_origin: US region: United States of America --- # Fully submersible & shatter-resistant LED heating indicator light Preset 78°F ±1° accuracy Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts **Price:** $56.13 **Availability:** ✅ In Stock ## Summary > 🌊 Keep your aquatic oasis perfectly heated—no adjustments, no worries, just vibrant life! ## Quick Answers - **What is this?** Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - **How much does it cost?** $56.13 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/19523632-aqueon-aquarium-fish-tank-preset-heater-for-up-to-40) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Heat Status:** Red LED indicator glows only when heating, so you always know your tank’s temperature is on point. - • **Sleek & Discreet Design:** Compact black heater blends seamlessly into any planted or reef tank setup without disrupting aesthetics. - • **Built to Last Underwater:** Shatter-resistant quartz glass ensures durability while fully submerged for safe, long-term use. - • **Safety-First Auto Shut-Off:** Automatically powers down if overheating, then resets—peace of mind for your aquatic friends. - • **Effortless Precision Heating:** Preset to 78°F with ±1° accuracy—no fiddling required, just perfect tropical temps. ## Overview The Aqueon Aquarium Fish Tank Preset Heater is a 100-watt, fully submersible heater designed for aquariums up to 40 gallons. It comes preset to a stable 78°F temperature with ±1° accuracy, featuring shatter-resistant quartz glass and an automatic safety shut-off to prevent overheating. Its compact black design and LED heating indicator make it both functional and visually unobtrusive, ideal for maintaining a healthy tropical fish environment with minimal effort. ## Description Aqueon Preset Aquarium Heaters require no adjusting! The preset temperature has been calibrated to 78°, appropriate for most tropical fish. It is fully submersible, constructed of shatter-resistant quartz glass and features an automatic safety shut-off to avoid overheating. The heaters include suction cups and can be placed vertically or horizontally within the aquarium. An LED indicator light displays red when actively heating. Available in different sizes to accommodate all aquarium sizes.Aqueon products offers a wide range of items so that you can build and maintain a healthy aquatic environment. All the essentials from fish tanks, filters, lighting, food, care, and other supplies that your pet fish needs. We make it easy for you to get your first aquarium and to grow in the hobby as you become more of a fish expert with every step you take and every new thing you learn. For those seasoned hobbyists, we are committed to aquarium product innovation so that we continue to offer products that get you excited. With the Aqueon brand, it's all about the fish.Disclaimer: Variations in room temperature may cause slight deviations in the actual water temperature. Review: Great customer service and 1 Yr warranty upheld - Constantly running on a 20 gallon mixed reef tank for the past 11 months as a backup secondary heater and worked great. I removed my main heater to for a few hours for maintenance and let this preset heater in the tank only. I noticed the temperature drop to below 75 degrees f (almost 3+ degrees below preset of 78). Contacted Aqueon as it is still under warranty and now they are sending me a replacement unit. Great customer service, too. Review: Good - This is a good heater, but have had a couple issues. This is my second one. The first one worked great, but after a few months, it stopped working. I ordered a new one, and this one keeps shutting off even though the water isn't that warm. Maybe it's on purpose, because it shuts off around 80 degrees, but I swear the first one heated warmer. My ideal would be about 82 degrees. ## Features - Preset to 78 degree, accurate to plus/- 1 degree - No adjustment required - Shatter resistant - Fully submersible, auto shut-off when overheats, resets when cools down - LED light turns on when aquarium water is being heated - Ideal for aquariums up to 30 gallons ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.3 out of 5 stars 3,810 Reviews | ## Images ![Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - Image 1](https://m.media-amazon.com/images/I/81vGIVg5NwL.jpg) ![Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - Image 2](https://m.media-amazon.com/images/I/813O9c-5jsL.jpg) ![Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - Image 3](https://m.media-amazon.com/images/I/71YeOCXWBUL.jpg) ![Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - Image 4](https://m.media-amazon.com/images/I/71jwd9SK0PL.jpg) ![Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - Image 5](https://m.media-amazon.com/images/I/912ZAY66lbL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Does this heater come with suction cups? This heater came with a 29 gallon setup I won but it did not have suctions cups.** A: Yes, it comes with 1 suction cup. Stay away from this product; spend a little bit more and buy one that has a lifetime warranty and you can set the temperature. **Q: What’s the lifespan of this heater?** A: Mine lasted less than 30 days, unfortunately it was a few days after the return cut off when I noticed this during my 3 week water and filter change **Q: is this a timed heater ? I have been having having trouble with the light turning off** A: I don't know that's it's timed. However initially it will stay at a preset of 78 but later it will start to keep temps of 75-77 depending on what size tank it's in. Also the black paint will chip off. Mine did within a couple months. Not good for Saltwater. :) **Q: If i use the 200 watt heater in a ten gallon tank will it be an issue?** A: Might be a bit much. Usually 30 -55 gallon for a 200 watt ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great customer service and 1 Yr warranty upheld *by A***R on January 6, 2026* Constantly running on a 20 gallon mixed reef tank for the past 11 months as a backup secondary heater and worked great. I removed my main heater to for a few hours for maintenance and let this preset heater in the tank only. I noticed the temperature drop to below 75 degrees f (almost 3+ degrees below preset of 78). Contacted Aqueon as it is still under warranty and now they are sending me a replacement unit. Great customer service, too. ### ⭐⭐⭐⭐⭐ Good *by K***L on February 14, 2024* This is a good heater, but have had a couple issues. This is my second one. The first one worked great, but after a few months, it stopped working. I ordered a new one, and this one keeps shutting off even though the water isn't that warm. Maybe it's on purpose, because it shuts off around 80 degrees, but I swear the first one heated warmer. My ideal would be about 82 degrees. ### ⭐⭐⭐⭐⭐ Accurate, Affordable *by M***C on January 4, 2026* Very pleased. I’d always thought aquarium heaters would be expensive and for very serious, high-budget aquarium aficionados. I’m thrilled that I can offer a little heater to my betta! I was worried about his water becoming too cold in winter. Now I can keep his tank warm without worrying about the overall room temperature. Great buy! I don’t love the look, but once you’re used to it, it’s just part of the tank. The alternative is to heat the entire room to temperature at all times, which is just unnecessary, so the aesthetic tradeoff is worth it. ## Frequently Bought Together - Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts - PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic - AQUANEAT LED Aquarium Light Full Spectrum for 18 Inch to 24 Inch Fish Tank Light Fresh Water --- ## 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.us/products/19523632-aqueon-aquarium-fish-tank-preset-heater-for-up-to-40](https://www.desertcart.us/products/19523632-aqueon-aquarium-fish-tank-preset-heater-for-up-to-40) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-20*