---
product_id: 52830982
title: "FREESEA Aquarium Fish Tank Heater: 50W Small Submersible Turtle Heater with Adjustable Temperature External Controller for Betta | Saltwater | Freshwater | 1-10 Gallon"
brand: "freesea"
price: "VT8310"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/52830982-freesea-aquarium-fish-tank-heater-50w-small-submersible-turtle-heater
store_origin: VU
region: Vanuatu
---

# 50W powerful heating Dual auto shut-off safety Adjustable 63℉-94℉ temp range FREESEA Aquarium Fish Tank Heater: 50W Small Submersible Turtle Heater with Adjustable Temperature External Controller for Betta | Saltwater | Freshwater | 1-10 Gallon

**Brand:** freesea
**Price:** VT8310
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your aquatic world perfectly cozy — because your fish deserve the best!

## Quick Answers

- **What is this?** FREESEA Aquarium Fish Tank Heater: 50W Small Submersible Turtle Heater with Adjustable Temperature External Controller for Betta | Saltwater | Freshwater | 1-10 Gallon by freesea
- **How much does it cost?** VT8310 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/52830982-freesea-aquarium-fish-tank-heater-50w-small-submersible-turtle-heater)

## Best For

- freesea enthusiasts

## Why This Product

- Trusted freesea brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety-First Design:** Auto shut-off when out of water or overheating protects your aquatic friends 24/7.
- • **Compact Yet Powerful:** 50W heater perfect for 1-10 gallon tanks, ideal for bettas, turtles, saltwater & freshwater setups.
- • **Long Reach Power Cord:** 5ft cable ensures flexible placement for any indoor aquarium environment.
- • **Real-Time LED Display:** Instant digital feedback on water temperature and error codes keeps you in the know.
- • **Precision Temperature Control:** External controller lets you fine-tune your tank’s climate without getting wet.

## Overview

The FREESEA 50W Aquarium Fish Tank Heater is a compact, submersible heating solution designed for 1-10 gallon tanks. Featuring an external adjustable controller with a 63℉ to 94℉ range, dual safety auto shut-off functions, and a real-time LED temperature display, it ensures precise and safe temperature management for bettas, turtles, and both saltwater and freshwater aquariums. Its 5ft power cord offers versatile placement, backed by 24-hour professional customer support.

## Description

Full description not available

## Features

- FREESEA Aquarium Heater: 50w betta fish heater, voltage: 110~120V, is suitable for use in 1-10 gal betta fish turtle tanks and aquariums. The power cord is 5ft, long enough for indoor use
- Double Safety Protection: When the top part of the turtle tank heater is out of water it will auto shut off. When the actual water temperature is higher than 94°F, it will auto activate the overheating protection and stop heating
- External Controller: The betta fish heater is adjusted by an external controller, which you can mount on the outside edge of the tank. It’s convenient to adjust temperature that range from 63℉ to 94℉
- LED Temperature Display: Digital led temperature display shows the real-time temperature and error code on the screen. When the mini aquarium heater is heating, there indicator light above the digit is on red
- Excellent Service: The Heater of the FREESEA operate very stably under Fish Tank. If you have any questions about the Heater you received, please feel free to contact us at any time. 24-Hour Professional After-Sales Service

## Product Details

- **Material:** Glass
- **Voltage:** 110 Volts
- **Item Length:** 3.5 Inches
- **Brand:** FREESEA
- **Color:** Submersible Heater with External Controller

## Images

![FREESEA Aquarium Fish Tank Heater: 50W Small Submersible Turtle Heater with Adjustable Temperature External Controller for Betta | Saltwater | Freshwater | 1-10 Gallon - Image 1](https://m.media-amazon.com/images/I/716knQX-94L.jpg)

## Available Options

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

## Questions & Answers

**Q: No directions came with my heater....How can I adjust the temp so that it actually sticks?**
A: Use the Button by the outlet side and then press it, it will start to flash press until your at the proper temp then leave it. It will adjust itself

**Q: Can i adjust it to set to 78 degrees F for a betta fish?**
A: Dear customer, 78 ℉ is ≈ 26℃ , designed temperature for this heater is 15~34℃，normally, suitable temperature for betta fish is 24~30℃（75~86℉）, we suggest you ask local fish store for more details.

**Q: What type of plastic is it made of?**
A: The Plastic is durable, does no appear to be fiberglass filed plastic. How ever the one I purchased is sitting in a box it didn't last much more than a month. an alert message flashed and I removed it as soon as I noticed it. Replaced it with a Cobalt Neo-Therm Heater.

**Q: Why is this Heater flashing 00?  Tried unplugging and resetting- still does not work.**
A: It flashes till you set the temp you want then it stops. If it keeps flashing then you need to contact seller and send it back.

## Frequently Bought Together

- FREESEA Aquarium Fish Tank Heater: 50W Small Submersible Turtle Heater with Adjustable Temperature External Controller for Betta | Saltwater | Freshwater | 1-10 Gallon
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**Shop now:** [https://www.desertcart.vu/products/52830982-freesea-aquarium-fish-tank-heater-50w-small-submersible-turtle-heater](https://www.desertcart.vu/products/52830982-freesea-aquarium-fish-tank-heater-50w-small-submersible-turtle-heater)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-01-27*