Marina Floating Thermometer with Suction Cup for Aquariums

It does what it is meant to, but it is extremely hard to read the accurate temp due to how small it is. The suction cup also damaged my tank, residue melts off and sticks to the tank wall making it impossible to remove. Due to limited options on Chewy I went with this one, but if you have more options I would not recommend this one.

I have had bad experiences with these thermometers. My fish keep breaking them so I had to switch over to the sticker kind.

I bought 2 and they both broke only used a month. One broke randomly in the tank and the other one broke when lightly touched.

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

Did exactly as it said no mess no green in water super clear water!

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.

I got this for my new betta fish tank the readings were so wrong it said my newly added water was above 80 without the heater.

Got this thermometer for my betta's tank, works well and I am happy with my purchase!

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.