Aqua One Glass Thermometer with Suction Cup

A good cheap option if you want to monitor temperature consistency at a glance. Not the most accurate thermometer (tends to be plus or minus a few degrees from actual temp) but most fish don't need an exact temperature, just a consistent one.

Easy to read and works well.

Works well

I’m assuming it works well but I can’t read any of the numbers. Might be good for someone younger but all I can see is the green section.

Easy to read