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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.
Built in thermometer
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.
Dale
Reviewed in the United States on March 27, 2025
This heater did not hold temperature. It fluctuated constantly from 65-80 degrees. Very unreliable!
too many fake reviews
Reviewed in Canada on March 18, 2025
Well its trash they wrote 10w up to 3 gallon yet the very booklet that comes with 10w says 20w for 3 gallon, its also broken and changes tempature every few seconds both up and down lol i was scammed luckily can return
Jodie Conley
Reviewed in Canada on January 10, 2025
Item came early and was what I need. I appreciate it’s a standard plug rather than usb as my old one has the usb connection and it had become loose and disconnects to easily
Saesha
Reviewed in the United States on April 5, 2025
Great purchase. Works amazing. Great size
Clayton
Reviewed in Canada on August 20, 2024
Easy to set temp and keeps temp at right area very easy to use
GA
Reviewed in Canada on August 10, 2024
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.
pearlsport
Reviewed in the United States on February 18, 2024
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.
DB
Reviewed in Canada on November 3, 2024
An adjustable tank heater which shows the temperature to set to is good for any type of fish. Only way to make it better would be to differentiate the setting vs actual.
Melissa Gullickson
Reviewed in Canada on January 3, 2024
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.
Motasim N.
Reviewed in Saudi Arabia on January 2, 2024
Am totally not recommend itit works only around 30 days!!!its function princible is crazy.. it will turn on/off frequently within short time
Koreen
Reviewed in Canada on August 3, 2023
I bought this 20 watt ( recommended size) heater to avoid the temperature fluctuations of my non-adjustable heater as the water temperature would fluctuate between 75 to 84 degrees F this summer in my 1.5 gallon tank. My betta’s tail is shredding, probably because of water temperature stress. Well, I have my heater set at 79 degrees F and during the heat of the day my water temp is 81.5 degrees, this morning it was 75 degrees, so not much difference than my previous heater.
Donita
Reviewed in the United States on March 27, 2023
Have a small 2 gallon & is just what I needed to get the temperature up. There really is no actractive heater. But since small, easy enough to hide. Easy set up. Not much bigger than my thumb in length & diameter. Suction cup seems to hold & temp also holding. Fast delivery.
Karen J Gray
Reviewed in Canada on December 24, 2023
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.
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