It turns it on and off. But yes, it needs to be held.
Also, keep an eye on those thermometers. I have owned over 20 of them and they rarely last over a year. They continue to function but they start to be wildly inaccurate over time.
It turns it on and off. But yes, it needs to be held.
Also, keep an eye on those thermometers. I have owned over 20 of them and they rarely last over a year. They continue to function but they start to be wildly inaccurate over time.
These specific thermometers cannot be calibrated and can be off to begin and then get worse with age as their battery run low with use. I used to own quite a few until I placed over a half dozen in the same tank and got a temperature reading range over 5 degrees from high to low. You get what you pay for and I would also recommend a more expensive and accurate model................
These specific thermometers cannot be calibrated and can be off to begin and then get worse with age as their battery run low with use. I used to own quite a few until I placed over a half dozen in the same tank and got a temperature reading range over 5 degrees from high to low. You get what you pay for and I would also recommend a more expensive and accurate model................
I personally have moved onto combination LED heater thermometer controllers as well. They cost more (less than $100) but give me very accurate results on both fronts.
Here is thread in another forum that describes their use:
Minnesota Fish Keepers Forum • View topic - First heater Failure
Follow the link in my response to see what they look like.