Pacmans probably can feel belly heat and are very good at thermoregulating. The heat pad is useless on the wall, it goes under the tank for substrate heating. Thermostat probe should be under the substrate and set at 80-84F to stop the glass getting too hot. Use 2" of coir for it to work well. The top of the substrate will be cooler than the bottom about 75F or so but that's fine. You can also use a ceramic heat emitterr or incandescent bulbs instead or as supplemental heat to warm the air. Bio-active set ups are not very good for large frogs like pacmans, they'll uproot plants and probably produce more waste than can be managed. Humidity should be around 60-70%. Crickets or roaches are the best staple, feed them a varied diet of cricket or roach food, fruits and veg, then dust them with something like Repashy Calcium Plus everytime. Nightcrawlers, supplemented superworms and young mice dipped in calcium can be added every few feeds for variety. Feed your frog once a week or less if it's 2 years old, keep an eye on it's weight. Would recommend the book horned frogs by Ray Hunziker and the one by Philippe de Vosjoli as well