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Tetra HT Submersible Aquarium Heater

4.1 out of 5 stars 1,692 customer reviews

List Price: $19.99
Price: $9.99 Free Shipping for Prime Members
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50-watt
  • 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.
  • 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.
15 new from $9.99 2 used from $8.49
$9.99 Free Shipping for Prime Members
FREE Shipping
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Free 5-8 business-day shipping within the U.S. when you order $25 of eligible items sold or fulfilled by Amazon.
Or get 4-5 business-day shipping on this item for $6.40. (Prices may vary for AK and HI.)
Learn more about free shipping
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In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently bought together

  • Tetra HT Submersible Aquarium Heater
  • +
  • Marina Floating Thermometer with Suction Cup
  • +
  • LUFFY Betta Balls: Live Marimo Plants : Natural Toys for Betta Fish : Aquarium Safe
Total price: $19.93
Buy the selected items together

Special offers and product promotions

Size: 50-watt
  • Buy Used and Save: Buy a Used "Tetra 26447 Submersible Aquarium Heater, 50-Watt" and save 57% off the $19.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

Product description

Size:50-watt

All Tetra HT heaters have red/green indicator lights to let you know when the heater is heating(red) or on standby(green). The low voltage thermostat maintains water at 78°F without any adjustment required. Be sure purchase the correct heater for your tank size. Buying a heater too small for your tank can cause under heating. It is critical to ensure your tank is equipped with a hood or glass canopy to contain the heat inside the aquarium. All Tetra HT Heaters will shut off if an electrical short is detected for your safety.


Product details

Size: 50-watt
User Manual Manual [PDF]
  • Product Dimensions: 5.2 x 1.6 x 3.5 inches ; 8 ounces
  • Shipping Weight: 8.8 ounces (View shipping rates and policies)
  • ASIN: B000OQO69Q
  • Item model number: 26447
  • Average Customer Review: 4.1 out of 5 stars 1,692 customer reviews
  • Amazon Best Sellers Rank: #307 in Pet Supplies (See Top 100 in Pet Supplies)
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Important information

Directions
HT Submersible Heater (50 Watt) The new Tetra HT10 submersible heaters for aquariums ranging from 2 to 10 gallons are easy to use. The electronic thermostat automatically adjusts heat output to keep the water at a constant 78°F. All you have to do is place in the aquarium and plug it in

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This item Tetra 26447 Submersible Aquarium Heater, 50-Watt
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Customer Rating 4 out of 5 stars (1692) 3 out of 5 stars (370) 4 out of 5 stars (205) 3 out of 5 stars (888) 3 out of 5 stars (17) 4 out of 5 stars (1164)
Price $9.99 $9.99 $14.99 $13.02 $8.99 $30.29
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Item Dimensions 1.62 x 5.25 x 3.5 in 5.3 x 1.7 x 7.1 in 1 x 1 x 6 in 0.25 x 3 x 3 in 2 x 5 x 2 in 12.5 x 4 x 2 in
Size 50-watt Compact 25-watt 7.5 Watt, Round, up to 5 gal 10 Watt 50 Watt

Customer Questions & Answers

Customer reviews

Top customer reviews

on December 3, 2016
Size: 50-watt|Verified Purchase
0Comment| 121 people found this helpful. Was this review helpful to you?YesNoReport abuse
The manufacturer commented on the review below
Size: 50-watt|Verified Purchase
11 comment|Was this review helpful to you?YesNoReport abuse
The manufacturer commented on this review (What's this?)
Thank you for your review iDealShopper, Tetra appreciates customer feedback! The specific range for these heaters is 76 to 80 degrees, so a maximum of 78 degrees is actually ideal. You seem to have a lot of temperature fluctuation in a short period of time which is very unusual, as water temperature changes much more slowly than air temperature. It would be interesting to know what size tanks these heaters are installed in and whether you have them covered consistently or not. Also, the type of thermometer in use, as most thermometers are not very reliable, other than the pricier digital ones. At this time of year, it would be rather difficult to achieve 68 degrees in an aquarium, due to the very warm weather most of the country is having, currently.
All in all, Tetra would like more details on why you felt these heaters were not working consistently, and would welcome the opportunity to discuss this matter with you. My email is PHGAmazon@spectrumbrands.com.
on December 27, 2015
Size: 50-watt|Verified Purchase
0Comment| 3 people found this helpful. Was this review helpful to you?YesNoReport abuse
on April 7, 2016
Size: 50-watt|Verified Purchase
0Comment| One person found this helpful. Was this review helpful to you?YesNoReport abuse
The manufacturer commented on the review below
on October 4, 2016
Size: 100-watt|Verified Purchase
11 comment| 3 people found this helpful. Was this review helpful to you?YesNoReport abuse
The manufacturer commented on this review (What's this?)
Thank you for your review. I am sorry to hear you had this experience. If you need any assistance, please contact the Tetra Team at 1-800-526-0650.
on April 18, 2017
Size: 50-watt|Verified Purchase
0Comment|Was this review helpful to you?YesNoReport abuse
on September 27, 2016
Size: 50-watt|Verified Purchase
0Comment| 11 people found this helpful. Was this review helpful to you?YesNoReport abuse
The manufacturer commented on the review below
on June 21, 2017
Size: 50-watt|Verified Purchase
11 comment| One person found this helpful. Was this review helpful to you?YesNoReport abuse
The manufacturer commented on this review (What's this?)
Thank you for posting a review on this Tetra product, L.Srey! I am sorry to hear your fish got sick and passed away. At this time of year, the average temperature in most aquariums, per customer feedback is in the mid-70's and will not cause disease. Heaters will not turn on very often with average room temperatures at this level. Tetra takes pride in every product they make, and believe every customer should be completely satisfied with their purchase! We would be happy to help you with this heater. Please email me at PHGAmazon@spectrumbrands.com.

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