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Operation:
- Press the SET button to adjust the target temperature, press once to increase by 1°F, the target temperature can be set in the range of 64-93°F. External controller is not waterproof.
- Press and hold 'SET' button, power on the heater, and then release the button, the temperature unit will be changed between C and F.
Cautions:
- When there is moss or other dirt on the heater surface and LED screen, it needs to be cleaned with a soft brush in time.
- Disconnect the power outlet and wait 15 minutes before changing the water or removing the heater.
- Put the fish tank heater in the water, don't bury it.
- If the ambient temperature is very low, you need to choose a more powerful heater or use 2 heaters.
- If the water temperature is lower than the ambient temperature, the number will decrease when the heater is just put in the water. Please wait a few hours, the temperature will increase slowly as the power of the heater is too small.
Protection:
- Code"E1"-Out of Water Protection
When the fish tank heater is not fully submerged, the controller will display an "E1" error code and stop heating. When fully submerged again, the error code will disappear and the heater will start working.
- Code"H1"-Overheating Protection
When the water temperature exceeds 95°F, the heater will automatically cut off the power and stop heating and display the "H1" error code. When the water temperature is lower than 93°F, the error code disappears and the heater is in working condition.
Moderate size fish tank heater
too small heater will lead to uneven heating, and too large heater will take up too much space. This size is just right!
Digital controller
Easy to operate, button adjustment, no need to wet your hands when adjusting the target temperature,.
Display Temperature
The current temperature is directly displayed on the LED display screen, which is more intuitive.
Upgrade chip
Although I look like others, my chip is different. It can respond quickly after sensing the water temperature.
When placed vertically in the fish tank, it should be 100% immersed in the water.
When placed horizontally in the fish tank, it should be 100% immersed in water.
It is forbid for exposing some main body part of heater on water when using, this will cause the heater to display the "E1" code, the heater will suspend its work, and resume work after 100% immersed in water.
The water level of fish tank cannot be very low, as it is easily for heater to expose on water surface, this will cause the heater to display the "E1" code, the heater will suspend its work, and resume work after 100% immersed in water.
pearlsport
2025-08-09 18:32:06
We have a 2.5 gallon aquarium, with a Crown Tail Beta and 3 small Neon Tetras. Ideal temperature is 76F to 77F degrees. First, it’s not USB, and this operates on standard 110/120 plug. Exactly what I wanted. Installed the heater upright in one corner of the tank. I found that setting the heater to 78F keeps the water at 76.5F, measuring with a temperature probe furthest away from the heater in the opposite corner. Keep in mind that the heater is reading the water temperature at the heater, so adjust accordingly. I also use an “old school†floating glass thermometer for confirmation. It reads a constant 76+F. Setup is easy with suction cup, and adjusting the thermostat temperature is simple with pushing a button. The heater kicks on with a red light when the temperature drops 0.2F below setting, and kicks off with a green light when temperature reaches within 0.2F of set temperature. As it’s only 10w, you’ll see the temperature display drop until it heats back up. This cycle only lasts a couple of minutes. I must say, it works very well. And at only 10w, it’s not going to use much electricity. I’ll only be displeased if it doesn’t last awhile, but first impression is, it’s a winner.
Tor
2025-07-14 10:01:08
This has been so great for my 1 gallon nano betta tank. Easy to use. Regulates set temperature very well. Love the size.
Sarah
2025-07-02 15:56:40
I got this for a sea monkey tank and I was worried such a small heater wouldn’t be accurate, but it seemed to be accurate compared to my test thermometer! It keeps the temps steady, even in micro tanks and I like that it has a digitally setting temperature control. Not all aquarium heaters work, especially small ones, but this one does the trick! The water was already close to temperature so I can’t say how quickly it could completely heat a tank up. But for the few degrees that I needed it to heat, it immediately started heating those few degrees
LeviathanGuppies
2025-06-19 18:53:33
couldn’t heat 2 liters of water in brine shrimp hatchery to 80°, and the usb got so hot and had an awful smell i stopped using it bc i felt it was a fire hazard.
Jonas Ur
2025-06-03 17:08:11
Keeps my 2.5 gallon tank at the perfect temperature for my betta and it’s even better since it has the digital thermometer so I can always check on my bettas temperature! The only thing I would say is that the thermometer part is very close to the cord so that’s a bit of an uncomfortable placement to constantly check on my bettas status. But it does have everything to get the job done for small tanks like mine
Ash
2025-05-14 16:17:48
Works well and is a small size. Good for nano aquariums.
Suzanne Bennett
2025-05-04 11:39:46
After reading the reviews, I set the 10W heater a couple of degrees higher than desired in a 3 gallon tank. I wanted 72 degrees, so I set it at 74. It took a couple of days for the temperature to reach 72, but it has stayed at that temperature consistently for a week. This tank is just getting started, so there are no fish yet. Probably best to start out with an uninhabited tank to provide plenty of time for the heater to get established.
Dawn
2025-03-20 10:19:58
I purchased two of these for my betta tanks. One of them is working great and the other one overheated so much the water was 88°! Thankfully it was a brand new setup and didn’t have a fish in it yet. Otherwise it would have been boiled alive. I really like the heater. Replacement policy was easy. Hopefully the replacement will work properly.
Motasim N.
2025-03-08 14:16:45
Am totally not recommend itit works only around 30 days!!!its function princible is crazy.. it will turn on/off frequently within short time
Clayton
2025-03-07 10:07:08
Easy to set temp and keeps temp at right area very easy to use
Karen J Gray
2025-01-23 11:54:00
It is too early to say anything about service life but these are working better than Inhad hoped for.The rooms have been very cold here and a 50W preset heater simply couldn’t raise the temperature high enough above the ambient to keep betta fish comfortable in tanks of 5 and 7 gallons.Adding one of these to each tank solved the problem. The water temp does not match the set temperature exactly but it doesn’t matter because I always use a manual thermometer to double check.Once I had the water at my desired temperature they maintained it and the fact they don’t match set temp to actual water temp under these conditions is simply no big deal.The room temperature drops to 15-16C at night and is about 16-17C days and I’m happy if the tanks stay at 77F. I could have them up to 80F but I think the fish are better off a few degrees under that.The heaters have been in use about a month and so far so good, I’m quite pleased with them. They are very short and as heaters this size go, very unobtrusive.I hope they last at least a few years.
GA
2024-12-05 10:57:11
I'm using it to heat a small jug for hatching brine shrimp. At this price point, it's impressive that it has variable temperature settings and a digital temperature display. For the first few days, I monitored the temperature with an Inkbird controller and it proved reliable enough for my purpose.
Melissa Gullickson
2024-11-25 15:38:51
Keeps the tank warm and my betta fish happy. Bought a cheaper one from the pet store with no temp control and it barely did anything, this one is much superior.
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