This may sound stupid.. Probably shows how amateur I am at this.. But what should I use as a drainage layer.. I don't have one.. Can I use regular aquarium stones? I know your supposed to be careful with them because of the frog accidentally eating them.. Will it harm him not to have one for now? He just started to go normal colors and get comfortable in his environment I don't want to stress him out yet. Plus I have a hard time keeping the humidity up in his tank I have to spray 3-4 times a day plus keep the substrate soaked. I'm going into town this week to buy a waterfall and a fogger..