Quite a few things have changed since my last post - which I put up ages ago. I live in a different apartment, more spacious, so decided to have a tank built for my python. Acrylic, and made to match the size of the metal Ikea cabinet it stands on: 120 cm long x 40 wide x 50 tall. I did a lot of research before I started this off and these are the reasons why the tank is at it is: 1. The material is acrylic. It is very light (I can lift this tank with one hand without any effort), extremely clear (there is no light loss like there is with glass, which is something you don't realise until you see both materials next to each other) and it contains heat a lot better than glass. 2. The dimensions, as mentioned above, are based on the cabinet it sits on. I made it as large as possible so the snake has all the space it needs to go around and explore even when it is all grown up. 3. The sliding doors start at 10cm above the bottom. That means that there is a 10cm deep tray at the bottom, and the reason for that is the substrate I use - I decided to set up a naturalistic vivarium. More about that later. 4. There are two sliding doors, with a lock on each door. Easy access. 5. The top is closed off with two separate pieces of acrylic, held in place with 9 screws each (though I ended up using only 4 for each panel). I only open this for bigger maintenance so not as frequently as the sliding doors. 6. There are 4 rows of 5mm diameter holes (1cm apart) in each side panel. On one side they start about 10cm above the bottom, on the other side they are near the top. Air goes up when it gets warmer so in winter when I use the heating element I put it near the lower holes so the incoming cold air gets heated up and escapes on the other side through the holes that are higher up, and that creates a natural air flow). And that is it. I added heating (in winter) and LED lighting - more about that later. Total cost to get this tank made was HKD 2500, in one of the shops at the Prince Edward end of Aquarium Street in Kowloon. It's an older couple that runs the shop and they are very friendly and helpful.