---
product_id: 16701285
title: "Aquarium Fish Tank Heater, Preset, Up to 20 Gallons, 50 Watts | 20 gallon aquarium heater, fully submersible with auto shut-off, preset 78° and shatter-resistant quartz glass"
price: "₨713"
currency: SCR
in_stock: true
reviews_count: 13
url: https://www.desertcart.sc/products/16701285-aquarium-fish-tank-heater-preset-up-to-20-gallons-50
store_origin: SC
region: Seychelles
---

# Preset 78°F ±1° accuracy 50W power for up to 20 gallons Shatter-resistant quartz glass Aquarium Fish Tank Heater, Preset, Up to 20 Gallons, 50 Watts | 20 gallon aquarium heater, fully submersible with auto shut-off, preset 78° and shatter-resistant quartz glass

**Price:** ₨713
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your aquatic world perfectly cozy—no adjustments, just peace of mind!

## Quick Answers

- **What is this?** Aquarium Fish Tank Heater, Preset, Up to 20 Gallons, 50 Watts | 20 gallon aquarium heater, fully submersible with auto shut-off, preset 78° and shatter-resistant quartz glass
- **How much does it cost?** ₨713 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/16701285-aquarium-fish-tank-heater-preset-up-to-20-gallons-50)

## 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

- • **Smart Safety:** Auto shut-off prevents overheating, protecting your fish and tank 24/7.
- • **Built to Last:** Shatter-resistant quartz glass ensures durability and safety in your aquatic environment.
- • **Flexible Placement:** Includes suction cups for vertical or horizontal mounting—fits your tank setup seamlessly.
- • **Effortless Precision:** Preset to 78°F with ±1° accuracy—no fiddling required, just perfect tropical temps.
- • **Visual Heat Indicator:** LED light signals when heating is active—know your tank’s status at a glance.

## Overview

The Aqueon Aquarium Fish Tank Heater is a 50-watt, preset heater designed for tanks up to 20 gallons. Calibrated to maintain a stable 78°F temperature with ±1° accuracy, it features shatter-resistant quartz glass, an automatic shut-off for safety, and an LED indicator to show when heating is active. Easy to install with included suction cups, it offers reliable, maintenance-free warmth ideal for tropical fish environments.

## Description

Aqueon Preset Aquarium Heaters require no adjusting! The preset temperature has been calibrated to 78°, appropriate for most tropical fish. This 50W unit, ideal for aquariums up to 20G, 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.

Review: Best customer service ever - I purchased this product because of the quality and of course the great low price but most important the outstanding customer service this seller provides, if you have an issue this seller will go above and beyond to out your concerns first, I will be definitely purchasing more products from this seller, you will not go wrong 100%. Design: This product is designed to work automatically, I don’t need to make any adjustments, the temperature is set perfect for my fish tank and will turn on and off automatically but keeping the temperature stable.
Review: 50W great for 10 gal and smaller tanks :D - I have been using this product for years now and recently realized it is quite a bit cheaper on desertcart than other places so I bought it from here. The product did come damaged, but that was on whoever packaged it so I'm not docking points off because of human error, not the product's fault. So anyways, as I said, I've been using this for years now. Probably close to four years to be exact, and I really love this heater. I have tried others that weren't preset, but they were never as accurate as these. Sometimes, they do screw up after a long time of use and start to overheat the tank (which is where having a thermometer in place comes in handy). However, that usually happens after having the product for over a year, and if it happens before that Aqueon's customer service is more than happy and willing to send you a replacement. All you need for that is a picture of your receipt (whether digital or a physical copy) or to send a picture of the electrical wire cut as to make sure you aren't scamming them. I have dealt with their customer service a few times for various reasons and they are always timely and get back to you right away. I use this heater on all my tanks from my hospital tank of .7 gals (don't worry I don't put anything other than a betta in that little hospital tank) to my 10 gallon tanks. I can't attest to any of the larger ones other than the 50W heater as I sadly don't have room for a bigger tank until I move out, but it truly is wonderful in my smaller tanks. The only con I have is that the suction cup doesn't work super amazing after having it on the tank for a year, but I honestly don't care too much about it being perfect in the tank the exact way I want it. So long as it's in there and doing what needs to be done I don't care :D

## Features

- Preset to 78°, accurate to +/- 1°
- No adjustment required
- Shatter resistant
- Auto shut-off
- LED light turns on when aquarium water is being heated

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.2 out of 5 stars 874 Reviews |

## Images

![Aquarium Fish Tank Heater, Preset, Up to 20 Gallons, 50 Watts | 20 gallon aquarium heater, fully submersible with auto shut-off, preset 78° and shatter-resistant quartz glass - Image 1](https://m.media-amazon.com/images/I/71gn-Fn1ahL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best customer service ever
*by J***N on July 15, 2025*

I purchased this product because of the quality and of course the great low price but most important the outstanding customer service this seller provides, if you have an issue this seller will go above and beyond to out your concerns first, I will be definitely purchasing more products from this seller, you will not go wrong 100%. Design: This product is designed to work automatically, I don’t need to make any adjustments, the temperature is set perfect for my fish tank and will turn on and off automatically but keeping the temperature stable.

### ⭐⭐⭐⭐⭐ 50W great for 10 gal and smaller tanks :D
*by K***R on August 15, 2019*

I have been using this product for years now and recently realized it is quite a bit cheaper on amazon than other places so I bought it from here. The product did come damaged, but that was on whoever packaged it so I'm not docking points off because of human error, not the product's fault. So anyways, as I said, I've been using this for years now. Probably close to four years to be exact, and I really love this heater. I have tried others that weren't preset, but they were never as accurate as these. Sometimes, they do screw up after a long time of use and start to overheat the tank (which is where having a thermometer in place comes in handy). However, that usually happens after having the product for over a year, and if it happens before that Aqueon's customer service is more than happy and willing to send you a replacement. All you need for that is a picture of your receipt (whether digital or a physical copy) or to send a picture of the electrical wire cut as to make sure you aren't scamming them. I have dealt with their customer service a few times for various reasons and they are always timely and get back to you right away. I use this heater on all my tanks from my hospital tank of .7 gals (don't worry I don't put anything other than a betta in that little hospital tank) to my 10 gallon tanks. I can't attest to any of the larger ones other than the 50W heater as I sadly don't have room for a bigger tank until I move out, but it truly is wonderful in my smaller tanks. The only con I have is that the suction cup doesn't work super amazing after having it on the tank for a year, but I honestly don't care too much about it being perfect in the tank the exact way I want it. So long as it's in there and doing what needs to be done I don't care :D

### ⭐⭐⭐⭐⭐ Great small little heater, super easy To use.
*by K***R on November 22, 2019*

I love this little heater, it works good keeps the temperature steady as long as the lid is on, without the lid it does keep it a little on the cooler side but that makes sense it stays about 75 depending on how cold the room is otherwise it keeps it at the right temperature even without the lid. I bought four of these and have them in all my tanks and they are all doing well! I got them when they were priced at seven something and I couldn’t ask for a better heater for the price! They work good and they do what they’re supposed to. They’re small enough that you can put them in a small tank I have one of them in my 2 1/2 gallon, one in my 5 and a half gallon, and one in each of my 10 gallons, and they all work great! The only issue I’ve had with “one” of them is one came unstuck from the wall of the tank once which didn’t matter and all I did was re-stick it.

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-09-16*