hygger Mini Fish Tank Submersible Heater 20W for 1-5 Gallons Desktop Betta Aquarium Heater with Digital Display Controller Adjustable Temperature
Condition: New
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Availability:
In Stock.
Arrives
Monday, Nov 2
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At a glance
- Condition
- New
- Size
- 20 Watt
- Model
- HG142
- Weight
- 9.6 oz
- Color
- black
- Directions
- adults 18 years and older
- Age Range Description
- Adult
- In the box
- heater element
- Warranty
- 1 year manufacturer
Features 5
- Beep Alarm, Fault Prompt: Our nano aquarium heater has safety features such as low water level shutdown and overheat protection. When the temp control system detects a malfunction in the equipment, it will give an error code alarm and stop heating to prevent any potential damage or injury. Note: Although the system will automatically turn off the power when a malfunction occurs, residual heat in the heating rod may melt the shell. Please handle it as soon as possible
- Black Look & Mini Size to Hide Easily: The 20-watt Betta heater with a 4" long x 1" height heating element design takes up very little space, which could effortlessly fit into about 1-5 gallon small aquariums and is also suited for shallow water turtle tanks
- Adjustable Temperature Control: hygger mini submersible heater includes an external thermostatic temperature controller, you can easily set the temperature by cycling between 59 and 93 degrees, and the digital display makes for intuitive viewing of real-time water temperature. Once the heater is on, an indicator light will tell you whether it is in heating mode or on standby
- Intelligent Automated Heating: This small fish tank heater effectively maintains the water at a steady temperature, when it reaches below your set temp, it kicks on and then turns off when it reaches the desired temp. Also, with the memory function, you don't have to reset the temperature if you get power outages
- Safety Instruction: Please keep the heating rod fully submerged, and use the two suction cups to make it easier installed vertically or horizontally on the tank wall. Make sure to unplug before water change or cleaning cool down the fish heater for 15 minutes
Description
Focus on aquarium supplies, hygger keeps on providing great valued products to release you from the chore of maintenance and taking good care of your beloved pets. Note: Temperature is shown in °F only. Cannot switch to Celsius. Note: This heater is not suitable for saltwater aquariums.
Specs 13
| Package Dimensions | 6.42 x 5.24 x 1.85 inches; 9.59 ounces |
|---|---|
| Item model number | HG142 |
| Manufacturer | hygger |
| Item Weight | 9.6 ounces |
| Item Package Dimensions L x W x H | 6.42 x 5.24 x 1.85 inches |
| Brand Name | hygger |
| Directions | adults 18 years and older |
| Model Name | aquarium heater |
| Color | black |
| Size | 20 Watt |
| Age Range Description | Adult |
| Number of Items | 1 |
| Specific Uses for Product | use in aquariium |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 2
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Works well for small tank
Size: 20 Watt
I bought this for my 2nd betta tank. Most of my fish tank accessories and cleaning item are from Hygger. Their product has not disappointed and same goes for this mini heater. The heater looks like its well made and durable. Its designed to look nice and simple. Increasing and decreasing the temp is also very easy. This was definitely another good buy from Hygger
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Reviewed in the United States on September 26, 2026 by Ryan
Great and high quality product
Size: 20 Watt
I have this heater in both of my tanks and it’s very easy to set the temperature and tell when it’s done heating. I have this with a thermometer and the digital temperature is completely the same and an extremely accurate heater that instantly shows the time. The suction cups are very strong and in 2 months it has not shifted at all. It has little to no noise when heating only when something happens like overheating or dry running. It is very reliable and it has never broken down on me, it literally saves set temperature when I turn it off
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Reviewed in the United States on June 6, 2026 by Bill
It reads and heats the tank.Two accurate tempts
Size: 20 Watt
This is the third tank heater, i've bought, and the first 12 actually work like it's supposed to. That's why it got 5 stars. My only complaint if I may add is the light. It's in the bedroom. I had to move the heater to the sidewalk, and I still feel like I need curtains around the front of the tank. So the lights don't bother me at night when i'm in bed. I only have 2.5 gal tank.
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Reviewed in the United States on July 31, 2026 by Bonnie Sunshine Parker
Simple and effective
Size: 20 Watt
Effective heater for my 5 gallon betta aquarium that was super easy to get set up. I appreciate that it’s small, adheres to the tank wall well, and covered in plastic so I don’t have to worry about my fish getting stuck behind it. I don’t have a separate thermometer for the tank so I can’t vouch for how consistent it keeps the tank water, but my betta seems happy and healthy. This heater was especially helpful when I was doing ich treatment for my fish and needed higher temps. Very easy to adjust as you just click the set button through different temps until you find the temperature you want it to maintain. It would be nicer to have up and down arrows for this adjustment, but I don’t mind. I will update if I have any issues with it working in the future.
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Reviewed in the United States on February 11, 2026 by Kindle Customer
Great for 5 Gallon!
Size: 20 Watt
This heater is amazing. It’s working great for my 5 gallon tank. The only reason why I gave it four stars is because it’s difficult to lower the temperature. There’s a button that lets you click to rise it but there’s not one to help lower it and after unplugging it, it still stayed at the same temperature, which is fine.
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Reviewed in the United States on April 19, 2026 by Sa'tera Campbell
Excellent heater
Size: 20 Watt
This little heater keeps my tank at a 1° difference. That is ok with me.
Reviewed in the United States on October 4, 2026 by Lauretta
Number 1 nano heater
Size: 20 Watt
This is the best nano heater on the face of the planet. Suction cups hold the heater in place. Great quality and it perfect for my 2.5 gallon aquarium for betta. Has a digital thermostat and temperature read out of your current water temperature. Very accurate. Not need for internal thermometer or a external thermometer. Definitely worth the money to keep your betta healthy and alive. I have several hygger heater one for my 45 gallon tank and one for my 75 gallon monster tank. They have never broken. Just make sure when you put the heater in the tank for the first time or do any water changes to unplug it and wait 30 min before plugging it back in because the heater need to acclimate to the current water temperature before you plug it in. One advice most people getting into the aquarium trade for the first time make this mistake and plug the heater in right away and break the heater or shatter the glass tube. Also when setting your desired temperature you can only raise the heater by 2 degrees every hour till you reach the desired temperature because anything more than that will kill all your fish. Remember you need to acclimate your fish to the new temperature also or they will go into shock and die. So if your water temperature is 70 and you want 78 degrees you can only raise the temp 2 degrees every hour till your target temp is achieved.
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Reviewed in the United States on January 11, 2026 by Superfly
Great for Fluval spec v
Size: 20 Watt
Fits perfectly in the pump section of my Fluval spec v. Works much better than the non adjustable one I had originally.
Reviewed in the United States on July 13, 2026 by Manda