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Tetra

Tetra HT Submersible Aquarium Heater With Electronic Thermostat

  • Based on 15,086 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Aug 21
Order within 3 hours and 57 minutes
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Size: 10-30 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.
  • The HT20 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 10 to 30 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 decor.
  • Please read all label information upon delivery. DO NOT plug heater into an electrical outlet until it is placed inside the aquarium.

Description

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.

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 1.63 x 3.5 x 8.25 inches; 5.6 ounces


Item model number ‏ : ‎ 26446


Department ‏ : ‎ Unisex-Adult


Date First Available ‏ : ‎ March 22, 2007


Manufacturer ‏ : ‎ Tetra


Country of Origin ‏ : ‎ China


Best Sellers Rank: #1,316 in Pet Supplies (See Top 100 in Pet Supplies) #2 in Aquarium Heaters


#2 in Aquarium Heaters:


Item Weight: 5.6 ounces


Department: Unisex-Adult


Manufacturer: Tetra


Country of Origin: China


Item model number: 26446


Date First Available: March 22, 2007


Item Package Dimensions L x W x H: 7.24 x 3.35 x 1.97 inches


Item Dimensions LxWxH: 1.63 x 3.5 x 8.25 inches


Brand Name: Tetra


Target Audience Keyword: fish


Directions: See instructions


Warranty Description: See label


Model Name: Aquaria 75026446 Tetra Submersible Aquarium Heater 100Wt


Color: 10-30 Gallon


Size: 10-30 Gallon


Material: Plastic & steel


Age Range Description: All Life Stages


Number of Items: 1


Style: 10-30 Gallon


Included Components: Aquaria 75026446 Tetra Submersible Aquarium Heater 100Wt


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • works great!
Size: 2-10 Gallon
Works great! My fish seem happy and the temp stays at 78 degrees like it should. when i first put it in, it went up to 80 and I thought it was going to keep going up but then it stabilized. I would def buy this again - I have a 10G tank and it keeps it at a good level. Keep in mind, fish lovers, that heat does make water evaporate and you will need to add water to the tank every now and then, but it makes the fish happier (and more reproductive). ... show more
Reviewed in the United States on July 29, 2024 by Katarina Perri
    • This is the best heater
Size: 10-30 Gallon
I have three of these for different tanks and they work great! Highly recommend. Heaters don't last forever, so don't bother paying a ton of money unless they have features you need. I have tropical fish and the 78 degree target point is perfect. Also looks fine in the tank and seems well protected.
Reviewed in the United States on July 30, 2024 by Cole
    • great little heater
Size: 2-10 Gallon
Works well in my 5 gallon tank. Discreet in the back corner, and l have a thermometer to double check it and it is accurate. Been on for a fee months now and no complaints.
Reviewed in the United States on September 17, 2024 by Emily
    • Not perfect temperature, but works ok
Size: 10-30 Gallon
Nice compact heater that works well. However, the description states that the heater maintains a temperature of 25.5C, but my 20 gallon tank is at a steady 23-24C.
Reviewed in the United States on March 15, 2024 by Olga
    • Great little heater!
Size: 10-30 Gallon
Great heater. It’s in a 10 gallon tub on my patio that I put my guppy fry in. It keeps the water around 77 degrees which due to where it’s located and the amount of water it has to heat I’m very happy with it. I have had it for about two months now.
Reviewed in the United States on September 19, 2024 by Marlena
    • the app has been discontinued sadly
Size: 2-10 Gallon
plus one star for the priceing plus one star for the size so its not too big plus one star for the light indecading if its fully heated plus one star for the quietness of it unlike my filter which is very loud. the only problem is the app is discontinued and i needed it so 5 stars
Reviewed in the United States on September 20, 2024 by Autumn Lowe
    • Worked for 2 weeks!!!
Size: 2-10 Gallon
Got this 2 weeks ago and was thrilled that it kept my 3 gallon tank warm and my betta happy... until it stopped working last night after I cleaned the tank and changed partial water. It stopped working all together and water is ICE COLD this morning! The light is green and will occasionally turn red for a few seconds before going back to green (which is supposed to indicate the the water is at the correct temperature). Still cold. I called Tetra customer service after reading many of the reviews here with the same issue. I explained what happened and asked if there is anything I could do to fix it or reset the heater as another reviewer mentioned that customer service gave instructions which fixed the issue. The customer service rep I spoke to would not help or even talk to me further if I could not tell him the temperature. I explained that I do not have a thermostat therefore I wouldn't be able to check the temp but I assured him that the water was noticeably cold to touch in comparison to the warm water that has been consistent in the tank in the 2 weeks I've had this heater and tank. He rudely continued to cut me off and said that he couldn't help me if I don't have a temperature and he became more and more condescending in his tone has he continued. His customer service was TERRIBLE! I told him that I understood he needed to know the actual temp and that he couldn't trust the temperature based on touch, so I asked if he could at least tell me what the possible options are as far as fixing this issue would be as I saw many other amazon reviewers shared the same issue. He became increasingly frustrated, increasingly rude, saying that he needs the temperature to know if he needs to send a replacement etc. I graciously explained that it was not my intention to get a replacement. I just wanted to know if he could help me troubleshoot so that I can attempt to fix my heater before my betta dies. I'm not interested in waiting for a replacement heater to come in the mail. Eventually I just asked to speak to his supervisor multiple times before he finally he basically said (like a child with a bad attitude) "Fine....." and he patched me directly through to someone's voicemail. I WILL NEVER PURCHASE TETRA PRODUCTS for the simple fact that customer service is NOT a priority to them. A simple "I'm sorry you're having trouble with your new heater. Tell me what's happening and let's see what we can do...." would have been great and I would be willing to go to the nearest pet store and buy a replacement myself if he was willing to help me troubleshoot and exhaust all options first. Instead, the gentleman has no customer service training, does not know the meaning of showing empathy, and is not interested in helping anyone... unless you can tell him the temperature of the water even though this heater doesn't have a thermostat in the first place. ... show more
Reviewed in the United States on October 7, 2020 by L
    • Easy to set up and works great
Size: 2-10 Gallon
Eay to add to the tank and love the indicator late of were ever concerned!
Reviewed in the United States on September 12, 2024 by Susan Marshall

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