Marina Floating Thermometer for Betta Fish Tank with Suction Cup, Aquarium Thermometer, 11201A1

I was using one of those ubiquitous cheap digital thermometers on Amazon. The temperature fluctuated a lot with it. And I just really started to doubt it. I ordered this guy and it was 6 degrees hotter than the digital! Sure enough the digital thermometer was way off by 6 degrees! My poor fish was in 86 degrees water for a month. I am new to the hobby. And he is a betta….so this is the extreme end of the high temperature range. I’m just so glad I bought this.I tested this in a cup crammed full of ice and some water. This temperature read a perfect 32 degrees….this is how you calibrate a thermometer. The digital thermometer read 26. I don’t think i’ll ever be able to trust a digital thermometer again.The suction cup is glued in place. You can not swivle the thermometer to face a certain way. This doesn’t bother me as it ws so cheap.This is $2.49. It works great. And is easily hidden behind a plant. I think the people who said the suction cup broke….or left a mark….i’m pretty sure those reviewers have acrylic tanks. Probably low quality acrylic.This is a $2.49 thermometer that is 100% accurate.UPDATE: i have now tested this thermometer against a few digitals. One being a very expensive digital. This thermometer is spot on accurate.