Tetra Submersible Aquarium Tank Heater, 2-15 Gallon, 50-Watt

Walmart # 000856258

Tetra Submersible Aquarium Tank Heater, 2-15 Gallon, 50-Watt

Walmart # 000856258
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Keep your fish friends comfortable in this submersible aquarium heater. Designed for 2- to 15-gal tanks, the Tetra Heater 5-15 provides a steady 78-degree water temperature automatically. Just submerge the heater in the water, attach it to the side of the aquarium with the convenient suction cups and let it get to work heating the water. This fish tank heater includes a built-in thermostat that causes it to turn on when the temperature goes below 78 degrees, eliminating the need for adjustments. The red light lets you know when it's heating the water, so you can put it in and walk away as it does its job. The 50W Tetra Heater 5-15 features a shock-resistant glass tube and silicon carbide crystals that facilitate heat transfer and distribution. Ensure the water stays at an optimal temperature with this easy-to-use submersible aquarium heater.

About This Item

  • Tetra Submersible Heater
  • UL approved
  • No manual adjusments required
  • Electronic Thermostat automatically maintains 50W
  • Indicator light to tell you when it is heating
Customer Reviews
3.7 out of 5 Stars
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1-5 of 155 reviews

Does what it says

It keeps the tank at 78 degrees plus or minus 2 degrees, doesn't take up much space, little red light says its heating, suction cup works nicely, unplugged now it's summer though
Can be hidden by plants, can kinda see it's reflection

Excellent heater for small aquariums

during the short time I've been with this heater it works fine

Great product

I have used 2 of these heaters for the past 3 years and they have both been great. The heater does a good job of keeping up the temperature. I know this for a fact because my fish have been healthy and have lived long lives. I also own a crayfish and it has molted which is a good sign that the water is at the right temperature. Many people are reporting that it does not raise the water temperature to what they want, but that is probably because they are checking the temperature of the glass on the outside. You should dip your finger in to see if it's warm to decide because the glass will always be cooler than the water. This heater also has a small red light that glows when it's heating the water and it turns off when the water has maintained the right temperature, so don't take it as being broken. If you want to check to see if it's still working, place it in a cold bowl of water and plug it in. If it works, the red light should glow.

Small Heater for Small Tanks

Locating an aquarium heater for a tank less than 10 gallons is no easy task; the majority of heaters aren’t designed for smaller aquariums despite their continued popularity. I chose the Tetra Whisper Heater 2-15 gallon model for a few reasons; 1) I’ve used Tetra products over 25 years, 2) Its compact size of 4.75”. There is no thermostat; the heater is designed to maintain the water temperature between 76-80 degrees. I have monitored the temperature in my 5 gallon Mini Bow over several days, the temperature has evened out to 79 degrees. It is safe for acrylic tanks (I checked before purchasing), is completely submersible with the option of vertical or horizontal positions and contains a indicator light to let you know its working. I am quite pleased with this little heater and I’m sure my Betta (Indiana Jones) is thankful he won’t be subjected to temperature fluctuates that could lead to illness.

What I needed for a 3.5 gallon tank

I got this heater for my wife's betta because winter is coming. It keeps the water between 76 - 78° in a 3.5 gallon tank. You never need to unplug it when the water temperature reaches 78° and you never need to plug it in either unlike the other ones I have seen. The betta seems to be swimming a lot more now since the temperature is where it's supposed to be. The description says it's for 5 -15 gallon tanks, but the package says it's for 2 - 15 gallon tanks. I recommend this heater if you have a 5 gallon fish tank or smaller down to 2 gallons because anything higher the heater will struggle to keep the water warm because of more water it has to heat. Anything lower than 2 gallons the water would probably get too warm to quick and could harm your fish. The red light only comes on when it's heating the water. It goes off when it's done heating the water. It may kick back on to heat the water some more to get the water to 78°. When it reaches the right temperature the red light (heater) will kick off until it is needed again.
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