Fish Stick-on Temperature Sensor Touch Screen Digital Aquarium Thermometer with LCD Display (Red).

This thermometer is amazing. It sticks to the side of my fish tank and has accurate digital readings. For years I had the strips and it was difficult to see the exact temperature. Now I can see the exact temperature. Just the picture advertised. Excellent buy. Highly recommended.

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Like many other people here, this was an impulse buy for me. I had one of those standard stick-on thermometers and I could NEVER read it when the light was dim. It was really hard to see exactly what the temperature was, and that's important for me to know. I want to make sure the fish are doing well.So one evening after peering fruitlessly at my stick-on thermometer trying to figure out what in the world the temperature was, I said THIS IS RIDICULOUS. I went onto Amazon and voila, I found this one. I immediately ordered it.I AM SO HAPPY.Installing this is a breeze. I stuck it onto a corner where it's barely troublesome in terms of seeing the fish. But when I glance over at the tank, I can see in large letters exactly what the temperature is down to a tenth of a degree. There is no question. I also have alerts so if something goes wildly wrong with my heater I know that it happened. That adds peace of mind.I will never, ever, use one of those awful color-range stick-on thermometers again. This is absolutely perfect.In my picture there is "stuff" behind my thermometer but I did that on purpose. If you want to of course you can put yours somewhere that nothing at all is behind yours for even better visibility. I chose to put mine down in a corner. It is still FAR more visible than that other one was.Highly, highly recommended. And it comes with a spare battery! Who even does that any more!!

this is very handy bought 2

Best outer temp gauges I've found so far! I mostly love the look of them and being able to see through it is a big plus as well. They came with litum batteries so they should hold for a long while for sure. One failed pretty early but after replacing the battery it's been up and running since, the one still has the original battery and it's been about a year now so it lasts a very long time haha. Overall they super simple to use and add a very nice look. Only issue I've found is that if you use a magnetic glass cleaner you can't clean behind the thermometer. I just break out the long razor blade glass cleaner and problem solved! Thanks!