What is the thermometer saying?

[Joaquin]

Hi! I feel embarrassed asking this, but just gotta!
(Sorry that the picture is a bit small. I tried finding a bigger one.)

So, I have this "Aqua Culture Aquarium Floating Thermometer":

My betta's tank is usually always in the green ("safe") zone, but the other day I started thinking, "Is the green zone the 70s (in Fahrenheit) or is the top line of the green zone 70...which would mean I've had him in the 60s this whole time???"

Right now he is at the top of the green zone (I don't know if that would be 70 degrees or 80 degrees), and he is just fine (as usual)...so I know it's not a bad zone...but I am not sure what number that is.

I'm probably over analyzing this little thermometer, but about what temperature would you say he is at if he's at the top of the green zone?

[Cattitude]

Top of the top yellow zone is 80, bottom of the bottom yellow zone is 60. If you're at the top of the green zone you're at 78.

Your temp is fine, though some like to keep their fish at between 80 and 85. My tanks are generally at 80 - 84.

[Joaquin]

Ah, okay! Thanks!