No problem. It may be a bit too much. Some factors in heat buildup include ventilation and tank size. Low ventilation tanks will build up heat faster than high ventilation ones, and larger tanks have more area to heat. If it is too hot you can get a thermostat and possibly the other stuff(fogger mister etc) like I mentioned before, but if it is only a little too strong you can also mount it a bit above the tank, and it might do fine. Thermostats, mister, fogger and such gear can be invaluable of there is an unexpected heat weave, for example, hits and you can't make it home fast. I just figured I'd add a little more. I mostly just wanted to add the tank size and ventilation stuff.
They are really pretty frogs. They may not let you see them move all the time, but it's a treat when they do!