It kinda depends on how big the frog is when you buy him. If its a baby some people will start off in a little 5 gallon or in a small tub or lets say a medium size critter keeper, and some will just put them in a 10 gallon. I have my baby in a 10 and he/she is all over the place, very active little pacman actually. If its a sub adult you can start with the 10 forsure and then when hes an adult you can switch up to 20 gallon long. You don't want to start with the 20 if its a baby because it will more then likely just overwhelm him then he will become stressed and this can make him sick. Some people even just stick with the 10 gallon for the entire life of the frog. Heating I prefer heat pads but others use those ceramic heat emitters as well, from what I understand they don't dry out the tank as much as the lights. For the plants if you want some live ones I cant help you out because I don't have green thumb its more black, I killed my house plants that's how poor I am with plants and I will openly admit it. L.O.L But yes you want ones with big leaves for the frog to hide under, if they feel to exposed again they will become stressed and this is not good for him. If you do choose to go with live plants just remember these frogs love to burrow and there will be a good chance he may dig up some of your plants, I think I read in another thread that they suggest to keep the plants in the pot because of this reason. IM not a 100% sure about that part so again you may want to wait for someone else to chime in about the plants. Hope I was able to help you out some.