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Comprehensive Measures for Unforeseen Circumstances
Power Supply Must be 5V/2A
The power supply must be 5V/2A, not 1A, otherwise the USB mini aquarium heater will not be able to heat the fish tank.
Overheat Protection
Stops heating if water temp exceeds 97℉/36℃, displays error code (H1). The nano aquarium heater will resume heating once the water temp drops to below 93℉/34℃.
Memory Function
The mini fish heater automatically resumes last temperature setting after power outage, no need to reprogram.
User-Friendly Operation
Simple Setup
Simply press the "SET" button, and the temperature will increase by 1℉. When it reaches 93℉, pressing it again will reset it to 64℉.
Indicator Lights
The mini aquarium heater is equipped with indicator lights. A red light indicates that it is heating, while a green light indicates that it is maintaining the set temperature.
Suction Cup
For easy placement, the small fish tank heater comes with a suction cup. The suction cup can be securely and conveniently attached to the aquarium.
Amanda Catherine
2025-08-26 10:49:24
Small but mighty. It heats my 2.2 gallon tank perfectly. Definitely worth the money.
Stephani3
2025-07-01 11:01:23
I bought this for my 3 gallon betta tank and very pleased so far. I have had this installed in my betta tank for 3 days now and it is perfect. The directions were clear and precise on how to install and how to operate. The heater was very easy to install and worked very quickly in heating up my tank to the desired temperature I set it to. I like the design it is small and very sleek looking in the tank.
cyr85
2025-06-23 10:55:28
I bought this heater for a small Betta tank. The heater has display for the temperature. I also bought a digital aquarium thermometer. The two temperatures match within 0.1 degree. The heater was really easy to set, and only had to be adjusted once. Very happy with this purchase
Ygrowup
2025-06-20 14:09:06
Decent little unit Just can't reach 78° in a 3 gallon tank
ROANNA
2025-04-22 17:31:23
i had bought this a couple months ago for our 3 gallon beta fish tank. it was the only tiny heater with a great rating. after a month, it stopped working/began to malfunction. i was really upset. i messaged the seller. they replaced it, and it arrived super fast! then, they followed up with me. i appreciated that. great customer service. it is easy to use and does its job. highly recommended!
Customer
2025-04-14 10:09:25
Piece of garbage DO NOT BUY it doesn’t keep heat and system to set heat is janky. Couldn’t even keep a 2.5 gallon slightly warm
MO
2025-03-18 16:46:58
Pro: Small Compact SizeCon: doesn't hold temp consistently (ranges anywhere -3 to +1 compared to what you set it at), fish seemed to only hang out on side closest to heater; assume other areas were not as warm.Thought: Buy a Size larger for your tank vs. their recommendation and maybe it would hold temp better.However, I plan on keeping it to use to heat up new water to add to tank when doing partial water changes.
Desean Outlaw
2025-02-11 10:11:11
Using in my hydroponic system to keep temperature within range. Since I like my home very cool, this help to regulate the temp in hydroponic no matter how cold I have the house. Set it & go. Have 3 hydroponics growing tomatoes & cucumbers which can be stubborn. So far no issue.
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