--- product_id: 54483550 title: "FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon" brand: "FREESEA" price: "฿2691" currency: THB in_stock: false reviews_count: 18 category: "Pet Supplies" url: https://www.desertcart.co.th/products/54483550-freesea-aquarium-heater-with-led-display-100-watt-for-5 store_origin: TH region: Thailand --- # FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon **Brand:** FREESEA **Price:** ฿2691 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon by FREESEA - **How much does it cost?** ฿2691 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/54483550-freesea-aquarium-heater-with-led-display-100-watt-for-5) ## Best For - FREESEA enthusiasts ## Why This Product - Trusted FREESEA brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size:100W for 5 to 20 gallon Power off memory function, When power on, heaters automatically remember the temperature settings in last shutdown. FS 28 submersible aquarium heater with led display and company design. Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. Temperature accuracy ± 1 ℃. No need to buy another thermometer. ## Features - ★ Power off memory function, When power on, heaters automatically remember the temperature settings in last shutdown. - ★ Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. - ★ The heating rods to be completely immersed in water use, you can notleave the water for heating use,Please unplug the power supply when cleaning the fish tank or aquarium water changes. - ★ Due to the size of the gap in the shell design, in order to prevent fishes getting stuck in the gap, this product is not suitable for smaller fishes. (Maximum gap:0.6inch, the fish size should be large than 0.6inch length or width ) - ★ 12 Month Warranty and 24 Hour Professional After-sales Service. ## Images ![FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon - Image 1](https://images-na.ssl-images-amazon.com/images/I/51N%2BWxaSAjL.jpg) ![FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon - Image 2](https://images-na.ssl-images-amazon.com/images/I/514l9-2KnEL.jpg) ![FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon - Image 3](https://images-na.ssl-images-amazon.com/images/I/61cumV6JUnL.jpg) ![FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon - Image 4](https://images-na.ssl-images-amazon.com/images/I/51P6QeHme7L.jpg) ![FREESEA Aquarium Heater with LED Display 100 Watt for 5 to 20 Gallon - Image 5](https://images-na.ssl-images-amazon.com/images/I/41FxwCiPhnL.jpg) ## Customer Reviews ### ⭐⭐ So the heater did not overheat, but it fluctuated ... *by A***R on December 24, 2017* So the heater did not overheat, but it fluctuated too much. I put it in my tank, and one second it was warm and the next it became extremely cold. It wasn't keeping a constant warm temperature. Returned it. ### ⭐⭐ Disappointed - I was really hoping to like this *by E***Y on January 28, 2018* This thing is just way too big for what it is. The LED display is so ridiculously bright and unfortunately the heater overall doesn't work well for small tanks. It heats up the water way too much and doesn't properly regulate the temperature that I set it at. I ended up purchasing another small heater that works much better, plus without the obnoxiously bright temperature LEDs. Here's the one I got that I prefer much more and keeps the water right around 79 - 81 degrees for my betta fish: Aquatop Nano Aquarium Heater, 15-Watt (2.6 To 4 Gallon Aquariums / 77 Degree Fahrenheit Preset Temperature)I also bought a small temperature sensor with a suction cup that has the display outside of the water connected by a wire. Really the best setup for a small space that most betta owners will provide for their fish. ### ⭐⭐⭐⭐ Works fine. LED display always on. Degrees C only. *by R***E on January 2, 2018* I got this one because of the form factor. I didn't want the cigar shape of most heaters. This one seems to work fine, and it's overall short height means it doesn't get exposed if I forget to unplug it while doing a water change, so there's that...The red LED setpoint display is supposed to be a "cool" feature, but it really just annoys me because it's always on, and you can't look at the aquarium without noticing it. That display should have been incorporated in the in-line setpoint adjust module, not in the in-tank part of the heater. Also, if you're going to bother getting that fancy, why not provide a C/F display option? --- ## 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.co.th/products/54483550-freesea-aquarium-heater-with-led-display-100-watt-for-5](https://www.desertcart.co.th/products/54483550-freesea-aquarium-heater-with-led-display-100-watt-for-5) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-27*