Marina Floating Thermometer with Suction Cup for Aquariums

Perfect for the cheap price. Adheres well to tank but I can easily remove it and use it to measure new water temp before I add to tank during water changes. Numbers hard to read but green safe area lets me know at a glance how the temperature is doing. I have 2 - I bought the first one in a pet store and bought this one as spontaneous purchase when ordering gravel for another tank.

this thermometer is fine. It’s not excellent or perfect but it does read the temperature in my 2.5 gallon tank with a filter, live plants, and 1 beta. my cons: it’s a lil chunky (i feel like it could easily be more compact for space and aesthetics), the red that shows the temp is actually extremely thin making it quite difficult to read. I have to move back and forth up real close to see it, and the suction cup holding it inside my tank has developed some algae or gunk on it that my snail hasn’t been into cleaning. I take it out to clean and it has come back. my pros: it’s cheap, it tells me the temperature (yay), and despite the cons it works, i hardly ever think about it I just read it everyday this thermometer is fine. It’s not excellent or perfect but it does read the temperature in my 2.5 gallon tank with a filter, live plants, and 1 beta. my cons: it’s a lil chunky (i feel like it could easily be more compact for space and aesthetics), the red that shows the temp is actually extremely thin making it quite difficult to read. I have to move back and forth up real close to see it, and the suction cup holding it inside my tank has developed some algae or gunk on it that my snail hasn’t been into cleaning. I take it out to clean and it has come back. my pros: it’s cheap, it tells me the temperature (yay), and despite the cons it works, i hardly ever think about it I just read it everyday … more

I’m delighted with this inexpensive thermometer. It bobs inconspicuously on the surface of my pond outdoors. I find it easy enough to read within a few degrees so I know when to slow down or stop feeding my pond goldfish. Before I had expensive probes with remote connection to a multiple temperature display indoors. Those always needed battery changes and didn’t last. In this case, simple is a whole lot better.

A little hard to read because numbers are small but it’s fine for a backup for the heater. We just wanted to make sure heater thermometer was working right.

Very precise, my 4 stars responded to the fact that is very difficult to see the readings. It could become a 5 star review the day it comes with bigger numbers to see.

Well if you have 2 thermometers reading 2 different temperatures, I guess you need a third one to calibrate them. I'm sure this one works fine, I think my heater is off.

The first thermometer we ordered broke and Chewy sent a replacement. So far after 4 months the thermometer is still working this time but the suction has given out and no longer holds the thermometer on the tank wall. Doesn't seem to be a very durable item. And Chewy does not seem to want to replace a second time despite calls into customer service.

I purchase these for all my fish aquariums. Works wonderfully! However do not use in a turtle aquarium. My turtle suddenly bit it off the bottom and broke it.

The idea seemed good. It sticks to the side of the tank and is sturdy enough. Only problem is the writing on it is so small I can't read it!

It works but is very hard to see. Hat to use a magnifying glass to get a good reading.