American Small Vertical Liquid Crystal Aquarium Thermometer with Thermal Technology

Annie: Easy to use. Remove backing and place on the outside of tank, below water level. Works right away,
and works well.

United States on Mar 21, 2023

A. M. Stengle: I’ve checked the accuracy several times and it seems to be working so far.

United States on Oct 18, 2022

RebaReba: I actually got this for a little succulent plant I have in a dome grow pot. Wanted to keep it at the best temp for the type and this has helped alot. Not %100 sure how accurate it is out of water but seems to be correct. Indicates a couple of degrees over the room temp which is what I expected. Showing 77 Fahrenheit in the pic

United States on Jan 29, 2022

Megan: I read lots of reviews before purchasing and just re read to make sure I didn't miss something. This did not work. There are no color indicators. It's all just black. I'm really disappointed. I put the heater in but wanted to test the accuracy before taking my niece to get her new fish. Now we're going to have to wait until I can get something new.
UPDATE: After 36ish hours it did begin working! So I've changed my original rating.

United States on Apr 08, 2021

Mermaid MaraMermaid Mara: I have a little submersible heater in my 5 gallon betta tank. I could tell it was working and the water felt warm, but I was curious 'just how warm'. I stuck this on the glass on the opposite side of the hexagon tank (didn't want it on the same wall as the heater is stuck), and it read out the temperature right away. Also this saved my butt (and my betta) as somehow his heater became UNPLUGGED overnight (I blame my cats; they are Rulers of the Universe) and when I went to feed Elvis, I saw the temp had dropped to 72. Plugged the heater back in, and it's already heating back up (yay).

Included is a picture of The King himself, Elvis, the Blue Mustard Betta! He's a happy dude!

United States on Nov 12, 2020