--- product_id: 285164027 title: "Jager Aquarium Thermostat Heater 100W (Pack of 1)" brand: "eheim" price: "292.72 DT" currency: TND in_stock: true reviews_count: 5 category: "Eheim" url: https://www.desertcart.tn/products/285164027-jager-aquarium-thermostat-heater-100w-pack-of-1 store_origin: TN region: Tunisia --- # ±0.5°F TruTemp dial precision 100% fully submersible Auto shut-off dry-run protection Jager Aquarium Thermostat Heater 100W (Pack of 1) **Brand:** eheim **Price:** 292.72 DT **Availability:** ✅ In Stock ## Summary > 🔥 Keep your tank perfectly cozy — precision heating that’s always a splash ahead! 💧 ## Quick Answers - **What is this?** Jager Aquarium Thermostat Heater 100W (Pack of 1) by eheim - **How much does it cost?** 292.72 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/285164027-jager-aquarium-thermostat-heater-100w-pack-of-1) ## Best For - eheim enthusiasts ## Why This Product - Trusted eheim brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety-First Design:** Automatic shut-off prevents overheating or damage when water levels drop—peace of mind for your aquatic ecosystem. - • **Versatile Installation:** Calibratable thermostat works perfectly whether mounted vertically, diagonally, or hidden behind plants. - • **Energy Efficient Performance:** Runs cooler and cycles less, saving energy while maintaining stable water temperature for healthier fish. - • **Precision Temperature Control:** TruTemp dial lets you fine-tune aquarium warmth within half a degree for optimal aquatic comfort. - • **Sleek, Fully Submersible Build:** 100% waterproof design means seamless integration anywhere in your tank without bulky external parts. ## Overview The Eheim Jager 100W Aquarium Thermostat Heater is a fully submersible, energy-efficient heater featuring a TruTemp dial for ultra-precise temperature calibration within ±0.5°F. It includes a dry-run safety shut-off to protect your aquatic life and equipment, making it ideal for tanks between 26-40 gallons. Trusted by aquarists for reliable, stable heating and versatile installation options. ## Description All 9 EHEIM Heater models are 100% fully submersible and come with a new TruTemp dial that allows the user to recalibrate the heater within a +/- 0.5F degree accurancy for precise temperature readings. Review: Heater was delivered the day after I ordered it as expected. It comes well packaged and even has a plastic ring around the bottom of the tube to protect it in transit. I would have liked it if the cord was a bit longer. If you have your electrics hidden in a cabinet like I do, you need the cord to be able to go down the back of the tank, down the back of the cabinet and then into cabinet to where the extension socket is. If you don't have your aquarium right next to a socket, you are going to need an extension. Some people wonder why this heater 'needs' to be calibrated. I think that the truth is you don't really need to calibrate it, you could just set it to a reasonable temperature depending on your stock and then check the temperature with a thermometer for the first 24 hours or so, adjusting up or down as necessary. I think that the reason for the calibration wheel is that it enables you to set the exact temperature (in half degree increments) regardless of the ORIENTATION of the heater. Most people will hang their heater diagonally, the instructions for this one say to place it vertically but I have heard of people placing it horizontally as well (to hide it behind plants for instance). You can imagine that depending on orientation, the the thermostat might read the ambient water temperature slightly differently. The other thing that I like about this heater is that it seems to be a bit more efficient than others I've looked at. I used the 100w model to replace a 150w Fluval model that exploded as I removed it from the aquarium (never do a water change without turning off your heater first!) Looking at other models of heater, a 150w model was suggested for my 129 litre tank. In this range, the Jager 100w seems to be enough. Not sure how this is possible, but it seems to work fine. Perhaps the heater is cycling less and that can only be a good thing in terms of the stability of the water temperature and the longevity of the heater. Review: A must have for your aquarium. Works great but must clean your heater every month. ## Features - Fully submersible - Thermo safey control protects against running dry - Will automatically turn off when water level dips too low - TruTemp dial recalibrates the heater for precise temperature regulation - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003SNU1I2 | | Allergen Information | Apple Free | | Batteries Included | No | | Best Sellers Rank | #83,553 in Pet Supplies ( See Top 100 in Pet Supplies ) #5,341 in Aquarium Accessories | | Color | RED | | Customer Reviews | 4.4 4.4 out of 5 stars (1,224) | | Date First Available | 8 August 2012 | | Item Weight | 290 g | | Item model number | 3614090 | | Number of Items | 1 | | Pet Type | Fish and Aquatic | | Quantity | 1 | | Size | 26-40 US Gallons | | Specific Uses | Heating | | batteries required | No | ## Images ![Jager Aquarium Thermostat Heater 100W (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/41-NtIUAmeL.jpg) ## Questions & Answers **Q: I have had these go bad on me didn't get more than 2 years out of them Can anyone recommend a better brand?** A: I change mine every two years. You take a glass and rubber device, submerge it, watch it heat and cool many times per day and expect it to live forever. Won't happen. **Q: Does this fit in a 10gal tank?** A: It will fit, but it's too much heater for a ten gal. **Q: Is EHEIM Jager Aquarium Thermostat Heater 100W fully submersible in water?** A: It is completely submersible. If it isn't submerged, the automatic shutoff may kick in. It will work vertically or horizontally. I installed all of mine horizontally behind the rocks so they aren't visible. **Q: Is this good for a nano tank?** A: This is good for a 20-30 gallon tank. Most nano tanks are much smaller and stand the chance of overheating. Even if that didn't happen they would cycle a lot and wear out quicker. Also, they are pretty long and most likely would not fit in a nano tank. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by G***L on 19 August 2016* Heater was delivered the day after I ordered it as expected. It comes well packaged and even has a plastic ring around the bottom of the tube to protect it in transit. I would have liked it if the cord was a bit longer. If you have your electrics hidden in a cabinet like I do, you need the cord to be able to go down the back of the tank, down the back of the cabinet and then into cabinet to where the extension socket is. If you don't have your aquarium right next to a socket, you are going to need an extension. Some people wonder why this heater 'needs' to be calibrated. I think that the truth is you don't really need to calibrate it, you could just set it to a reasonable temperature depending on your stock and then check the temperature with a thermometer for the first 24 hours or so, adjusting up or down as necessary. I think that the reason for the calibration wheel is that it enables you to set the exact temperature (in half degree increments) regardless of the ORIENTATION of the heater. Most people will hang their heater diagonally, the instructions for this one say to place it vertically but I have heard of people placing it horizontally as well (to hide it behind plants for instance). You can imagine that depending on orientation, the the thermostat might read the ambient water temperature slightly differently. The other thing that I like about this heater is that it seems to be a bit more efficient than others I've looked at. I used the 100w model to replace a 150w Fluval model that exploded as I removed it from the aquarium (never do a water change without turning off your heater first!) Looking at other models of heater, a 150w model was suggested for my 129 litre tank. In this range, the Jager 100w seems to be enough. Not sure how this is possible, but it seems to work fine. Perhaps the heater is cycling less and that can only be a good thing in terms of the stability of the water temperature and the longevity of the heater. ### ⭐⭐⭐⭐⭐ Review *by D***V on 4 January 2026* A must have for your aquarium. Works great but must clean your heater every month. ### ⭐⭐⭐⭐⭐ Review *by R***. on 25 April 2025* Awesome. That is all. Great product. Works well, temp is consistent (measure with digital thermometer). Best part thus far...if i forget to unplug when cleaning (water lowers) it senses low water and doesnt turn on. Will buy more in future (bigger tanks) ## Frequently Bought Together - EHEIM Jager Aquarium Thermostat Heater 100W ( Pack of 1) - Inkbird Freshwater Saltwater Aquarium Heater with Probe Thermostat and Thermometer Tropical Fish/Ornamental Shrimp/Reef Tanks 24 Hours Double Time with Day Night Automatic Temperature Controller - PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic --- ## 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.tn/products/285164027-jager-aquarium-thermostat-heater-100w-pack-of-1](https://www.desertcart.tn/products/285164027-jager-aquarium-thermostat-heater-100w-pack-of-1) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-24*