Hi there
Milk frogs will need a heat bulb (Under 5o watts) and or a heat
mat on the side of the tank, it is preferable to add small uvb lights
to ensure a healthy frog but these are not mandatory, if you started
to use any of these i have mentioned and they raise the temperature
too much, i would use a dimmer on the heat mat or lights so the
temperature is not as hot.

Hope this helps!