Pixies wont eat

[GrifTheGreat]

The female is 3 inches, in a 10 gallon. 3 inches of substrate with a heatpad on the side.
The male is in a identical setup but 20 gallon long.
Both has a container with water to soak that I change every 3 days.

The female eat a thawed out pinky a few days ago.
But the male has not eaten anything, and the female has also not eaten anything since then. They just turn away.

The humidity is around 70-90%
The temperature on the side with the heat pad is 77-79, cool side 75-77

edit The male eat one of the hissers. I don't know why it eat the hisser but not the fuzzy.
edit the male threw it up and the hisser was alive

Warm them up. the temp should be 80 or a little higher. Cover 3 sides of each tank with some sort of background. Water should be changed daily. Are you de-chlorinating your frogs water?

[gbatemper]

Warm them up. the temp should be 80 or a little higher. Cover 3 sides of each tank with some sort of background. Water should be changed daily. Are you de-chlorinating your frogs water?

Yeah. I use a small filter so I clean it out every few days, so is it still mandatory to change it every day?

Would covering the tank with a background help keep heat?