---
product_id: 258020686
title: "Tetra HT Submersible Aquarium Heater"
brand: "tetra"
price: "6633 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/258020686-tetra-ht-submersible-aquarium-heater
store_origin: IS
region: Iceland
---

# Efficient, no batteries required Compact 13.34x4.11x8.89 cm design Durable, premium quality materials Tetra HT Submersible Aquarium Heater

**Brand:** tetra
**Price:** 6633 kr
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your aquatic world perfectly cozy — no fuss, just flow! 🐠

## Quick Answers

- **What is this?** Tetra HT Submersible Aquarium Heater by tetra
- **How much does it cost?** 6633 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/258020686-tetra-ht-submersible-aquarium-heater)

## 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

- • **Built to Last:** Crafted with high-quality materials for long-term durability
- • **Trusted Brand:** From Tetra, a leader in aquarium innovation and reliability
- • **Plug & Play Power:** No batteries needed—just submerge and power up instantly
- • **Precision Heating:** Engineered to maintain optimal water temperature with industry-standard accuracy
- • **Sleek & Space-Savvy:** Compact construction fits seamlessly in any aquarium setup

## Overview

The Tetra HT Submersible Aquarium Heater is a compact, durable, and efficient heating solution designed to maintain ideal water temperatures for your aquatic pets. With its sleek design and battery-free operation, it offers hassle-free installation and reliable performance, backed by Tetra’s trusted brand legacy.

## Description

Designed as per the prevailing industry standards, it scores high on the aspect of utility. The quality material used in its construction makes it durable.

## Features

- Designed to perfection
- Compact construction
- Packed with features
- Brand: Tetra

## 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 |
| Color | Black |
| Volume | 1 Milliliters |
| Number of Items | 1 |
| Quantity | 1 |
| batteries required | No |
| Batteries Included | No |
| Item Weight | 222 g |

## Images

![Tetra HT Submersible Aquarium Heater - Image 1](https://m.media-amazon.com/images/I/71CH35bZjVL.jpg)

## 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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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-23*