I found a shop that sells guards so I don't have to make one. Humidity is not a problem, it is at 75% now. I'm not going to buy another viv, because I'm only 16 and this one was pretty expensive (€225,-). I'm going to insulate it with 2cm cork, and I wil update the results.the gaps in chicken wire will be too big and the snake will get through holes. I have been keeping arboreal snakes for many years and I can tell you, you really will struggle to provide the proper heat and humidity in a glass viv that is a metre high.