Help keep your finned friend’s comfortable with Tetra’s HT55 Submersible Aquarium Heater & Electric Thermostat. This submersible heater comes with an electric thermostat that is specifically designed to keep 40 to 55-gallon aquariums at a constant 78 degrees Fahrenheit. The indicator lights turn red or green to let you know when it’s heating (red) or when it’s on standby (green). This heater can be installed vertically or horizontally inside your aquarium.
Helps keep your aquarium at a constant temperature for your scaly sidekicks.
No need to adjust the temperature—the built-in thermostat helps keep the water temperature at 78° F, which is ideal for most tropical fish.
Install it vertically or horizontally to help conceal it behind plants or other décor.
Comes with indicator lights to let you know when it's heating (red) or on standby (green).
Specially designed for aquariums that hold between 40-55 gallons of water.
I had it for about 9 months. It doesn’t really make my tank feel warm and seems to set it at room temperature. I had just replace with it was better heater.
Garbage dont buy
on Mar 1, 2021
Broke after 2 months and almost killed all my fish. Chewy sent me a 2nd one for free (thanks chewy) and that one also broke. I don't recommend
do not buy
on Sep 28, 2020
I bought this heater over 6 months ago. It worked fine but then we woke up to all are fish dead. The heater malfunctioned and cooked all of my fish :(
on Jan 9, 2021
SO FAR SO GOOD KEEPS THE TANKS AT JUST THE RIGHT TEMP
on Aug 30, 2020
Bought it a couple of months ago, worked fine for first month and now its not even warming water any more. Don’t waste money on this item
on Aug 12, 2020
Have had less than a month and it’s not even heating my tank to 60 degrees now. My fish are angry now I have to hurry and get a heater!
Waste of money.
not a good idea
on Jun 9, 2020
Haven’t had mine very long- it has ALWAYS kept my tank cool... now it isn’t even working! I have Molly’s so they have the shimmies and I am in a hurry to get a good one! Never again
Defective no green/red light
on Sep 10, 2019
Price was to good to be true.... I don’t know if I got a defective heater or if this was just one awful product over all. Very disappointed in tetra, my heater never turned red or green at any moment. I’m glad I had a back up 100W heater from aqueon which gave me enough time to go to my local pet store to purchase a 200w! My fishes would have probably died if I hadn’t notice this wasn’t working the minute I realized my temp was dropping drastically. I should have read the reviews on this same product but different WATT, if you realize majority of the other reviews are pretty much saying the same thing that happened to me.
Works just fine
on Nov 1, 2019
Was concerned with a preprogrammed heater but seems to be working just fine for my turtle. Would like to see one not made of glass though.
Survived a potential disaster
on Aug 4, 2019
I use this heater to keep my turtle's water near 78 degrees and it works well even though it is in the filter sump rather than the actual tank.
The sump pumped itself dry when the outlet to the sump got clogged. I thought I had lost the heater only a week after buying it. Amazingly it STILL WORKS. It didn't break or burn up. Thanks for the high quality dependable design.