---
product_id: 52830982
title: "FREESEA Adjustable Turtle Tank Heater: Precise Temperature Control 64-95℉ | Deviation of Less 1.8F - Keep 1-10 Gallon 1.5\" Shallow Water Turtle Tank Steady & Safe - External Controller Easy to Adjust"
brand: "freesea"
price: "HK$265"
currency: HKD
in_stock: true
category: "Freesea"
url: https://www.desertcart.hk/products/52830982-freesea-adjustable-turtle-tank-heater-precise-temperature-control-64-95
store_origin: HK
region: Hong Kong
---

# 50W precise heating power Dual auto shut-off safety system Adjustable 63℉-94℉ external controller FREESEA Adjustable Turtle Tank Heater: Precise Temperature Control 64-95℉ | Deviation of Less 1.8F - Keep 1-10 Gallon 1.5" Shallow Water Turtle Tank Steady & Safe - External Controller Easy to Adjust

**Brand:** freesea
**Price:** HK$265
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your aquatic world perfectly heated — because your fish deserve the best vibe.

## Quick Answers

- **What is this?** FREESEA Adjustable Turtle Tank Heater: Precise Temperature Control 64-95℉ | Deviation of Less 1.8F - Keep 1-10 Gallon 1.5" Shallow Water Turtle Tank Steady & Safe - External Controller Easy to Adjust by freesea
- **How much does it cost?** HK$265 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/52830982-freesea-adjustable-turtle-tank-heater-precise-temperature-control-64-95)

## 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 activates if heater is exposed or water exceeds 94℉, protecting your aquatic friends.
- • **Real-Time LED Display:** Digital temperature readout with error codes keeps you informed at a glance.
- • **Reliable 24/7 Support:** FREESEA’s dedicated customer service ensures your tank stays cozy and your worries minimal.
- • **Precision Heating Power:** 50W ensures stable warmth for 1-10 gallon tanks, perfect for bettas and turtles.
- • **Custom Temperature Control:** External controller lets you dial in the perfect aquatic climate from 63℉ to 94℉ with ease.

## Overview

The FREESEA 50W Aquarium Fish Tank Heater is a compact, submersible device designed for 1-10 gallon freshwater and saltwater tanks. Featuring an external adjustable controller with a temperature range of 63℉ to 94℉, it offers precise climate control. Dual safety protections include automatic shut-off when exposed or overheating above 94℉. The digital LED display provides real-time temperature and error alerts, backed by responsive 24-hour customer support.

## Description

desertcart.com: FREESEA Aquarium Fish Tank Heater: 50W Small Submersible Turtle Heater with Adjustable Temperature External Controller for Betta | Saltwater | Freshwater | 1-10 Gallon : Pet Supplies

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075PSPCNY |
| ASIN  | B075PSPCNY |
| Best Sellers Rank | #31,338 in Pet Supplies ( See Top 100 in Pet Supplies ) #53 in Aquarium Heaters |
| Brand Name | FREESEA |
| Color | Submersible Heater with External Controller |
| Customer Reviews | 4.3 4.3 out of 5 stars (7,499) |
| Date First Available  | September 17, 2017 |
| Is Discontinued By Manufacturer  | No |
| Item Length | 3.5 Inches |
| Item model number  | FS28-50W |
| Manufacturer | FREESEA |
| Manufacturer  | FREESEA |
| Material Type | Glass |
| Model Number | FS28-50W |
| Part Number | 4334822537 |
| Product Dimensions  | 2.5 x 1.5 x 3.5 inches; 8.15 ounces |
| UPC | 722970219243 |
| Unit Count | 1 Count |
| Voltage | 110 Volts |
| Wattage | 50 watts |

## Product Details

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

## Images

![FREESEA Adjustable Turtle Tank Heater: Precise Temperature Control 64-95℉ | Deviation of Less 1.8F - Keep 1-10 Gallon 1.5" Shallow Water Turtle Tank Steady & Safe - External Controller Easy to Adjust - 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
- PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic
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**Shop now:** [https://www.desertcart.hk/products/52830982-freesea-adjustable-turtle-tank-heater-precise-temperature-control-64-95](https://www.desertcart.hk/products/52830982-freesea-adjustable-turtle-tank-heater-precise-temperature-control-64-95)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-07-25*