would this work in a one gallon tank?

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.

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?

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.

Will this be okay in a 3 gallon betta bowl i'm making? if not any recomendations?

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!

Does it turns off automatically

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

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

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

Product ID: 2118461

Details

Brand
Tetra
Color
Black
Item Weight
7.84 ounces
Material
glass
Wattage
50 watts

💡Dual-color indicator light

🔒Auto shut-off safety feature

🔥50W precise heating power

R768

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Description

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

DURABLE RELIABLE - Heat- and shock-resistant glass tube with silicon carbide crystals ensures even heat distribution and long-lasting performance.
SAFETY FIRST DESIGN - Automatic shut-off triggers on electrical shorts, protecting your aquatic ecosystem and home.
COMPACT CONCEALABLE - Slim, fully submersible design fits discreetly in 2-10 gallon tanks, blending seamlessly with décor.
VISUAL HEATING STATUS - Red and green indicator lights keep you instantly informed when heating is active or stable.
EFFORTLESS TEMPERATURE CONTROL - Built-in electronic thermostat maintains a perfect 78°F—no manual adjustments needed.

The Tetra HT 50-Watt Submersible Aquarium Heater is engineered for 2-10 gallon tanks, featuring an electronic thermostat that automatically maintains an ideal 78°F for tropical fish. Its dual-color indicator lights provide real-time heating status, while built-in safety shut-off protects against electrical faults. Compact and fully submersible, this durable heater boasts heat- and shock-resistant glass with advanced silicon carbide crystals for efficient heat transfer, making it a trusted choice for both novice and experienced aquarists.

Specifications

ASIN	B000OQO69Q
ASIN	B000OQO69Q
Batteries	Product Specific batteries required.
Best Sellers Rank	#17,833 in Pet Supplies ( See Top 100 in Pet Supplies ) #31 in Aquarium Heaters
Brand Name	Tetra
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (11,967)
Date First Available	March 22, 2007
Department	Unisex-Adult
Global Trade Identification Number	00046798264477
Included Components	Aquaria 75026447: Tetra Submersible Aquarium Heater 50Wt
Item Type Name	Aquarium Heater
Item Weight	7.84 ounces
Item model number	26447
Manufacturer	Tetra
Manufacturer	Tetra
Manufacturer recommended age	1 month and up
Material Type	glass
Model Number	26447
Number of Items	1
Part Number	AQ-26447
Product Dimensions	5.25 x 1.62 x 3.5 inches; 7.84 ounces
UPC	046798264477
Unit Count	1 Count
Warranty Description	Two year warranty
Wattage	50 watts

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.