---
product_id: 52115281
title: "HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon"
brand: "tetra"
price: "€ 47.75"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/52115281-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2
store_origin: FI
region: Finland
---

# Dual-color indicator lights Auto shut-off safety feature 50W precise heating power HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon

**Brand:** tetra
**Price:** € 47.75
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your tropical fish thriving with precision warmth and peace of mind!

## Quick Answers

- **What is this?** HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon by tetra
- **How much does it cost?** € 47.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/52115281-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2)

## Best For

- tetra enthusiasts

## Why This Product

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

## Key Features

- • **Safety First, Always:** Automatic shut-off triggers instantly if electrical shorts are detected, protecting your aquatic ecosystem.
- • **Compact & Concealable:** Slim, fully submersible design fits discreetly in tanks from 2 to 10 gallons, blending seamlessly with your décor.
- • **Flexible Installation:** Install vertically or horizontally to suit your aquarium setup without compromising style or function.
- • **Visual Heating Status:** Red and green indicator lights keep you informed at a glance—know exactly when your tank is heating or stable.
- • **Effortless Temperature Control:** Built-in electronic thermostat maintains a perfect 78°F—no manual adjustments needed.

## Overview

The Tetra HT 50-Watt Submersible Aquarium Heater is engineered for aquariums between 2 to 10 gallons, featuring a built-in electronic thermostat preset to 78°F for optimal tropical fish health. Its compact, fully submersible design allows flexible installation, while dual-color indicator lights provide real-time heating status. Safety is paramount with an automatic shut-off system that activates during electrical shorts, ensuring worry-free operation.

## Description

Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon

## Features

- All Tetra HT heaters have indicator lights to let you know when the heater is on. It will be red when heating and green when the proper temperature has been reached..All Tetra HT Heaters will shut off if an electrical short is detected for your safety.
- The HT10 uses a built in electronic theromstat to automatically maintain water at 78° F which is ideal for most tropical fish. No adjustment is requried.
- Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies
- The HT heater is fully submersbile and can be installed vertically or horizontally. It's small footprint makes it easy to conceal behind plants or other décor.
- Please read all label information upon delivery. DO NOT plug heater into an electrical outlet until it is placed inside the aquarium.
- All Tetra HT Heaters will shut off if an electrical short is detected for your safety.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 13.34 x 4.11 x 8.89 cm; 222.26 g |
| Batteries | Product Specific batteries required. |
| Item model number | 26447 |
| Pet Life Stage | 50 Watt |
| Flavor | flavorless |
| Allergen Information | Abalone Free |
| Colour | Black |
| Size | 50-watt |
| Volume | 1 Millilitres |
| Quantity | 1 |
| Batteries required | No |
| Batteries Included | No |
| Item Weight | 222 g |

## Images

![HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon - Image 1](https://m.media-amazon.com/images/I/71CH35bZjVL.jpg)

## Available Options

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

## Questions & Answers

**Q: would this work in a one gallon tank?**
A: I wouldnt because the temp on this can go up to 79 degrees in a 10 gallon tank, for that reason i purchased a 10 watt for my 1 gallon tank and it keeps the tank at a perfect temp of 78. Check out the Marina C10 Submersible on Amazon for $10.00.

**Q: Description says "the ht30 is adjustable between 72 degrees f and 85 degrees f". ok, why does the one i received say not adjustable, preset at 78?**
A: All of the HT Heaters are preset now.  Unfortunately, this is an old image and old description of the former HT 55. The description seems to have been translated to the HT 100 as well. Tetra is working to correct these issues immediately. We appreciate your bringing it to our attention.  If you need any other assistance, please contact the Tetra Consumer Relations Team at 1-800-526-0650.

**Q: Will this be okay in a 3 gallon betta bowl i'm making? if not any recomendations?**
A: Yea i think so. I seriously look at this every day and im sooooooooooo glad i bought it. My betta looked so depressed before in his bowl because my house gets down to 60 degrees and his water was getting cold and now he is so happy his water stays 78 and he swims like a happy fish and has a lot of  bubbles on top (means there happy). Its so crazy that warmer* water can make a fish soooo happy. This is a must. Yes buy it for a 3 gallon tank- i think it will work just fine and your fish will LOVE IT i promise! Let me know how it works out for you- because im so glad i got it!

**Q: Does it turns off automatically**
A: When it reaches the right temp. it automatically shuts off. When the light on it is green, it's heating; when the light is red, it's off

## Frequently Bought Together

- Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 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
- Tetra Water Cleaner Gravel Siphon for Aquariums, Easily Clean Freshwater Aquariums

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**Shop now:** [https://www.desertcart.fi/products/52115281-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2](https://www.desertcart.fi/products/52115281-ht-submersible-aquarium-heater-with-electronic-thermostat-50-watt-2)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-18*