I am constructing an enclosure for my Albino Burmese python out of a 135 gallon aquarium. I realize this is not the most practical of choices, but given the fact that I bought the tank for $50 it WAS the cheapest! The tank is 60" x 29" x 18", and is solid 1/2" glass all around. I will be turning the tank on its side, so the top becomes the front, and I'm using two 1/4" Lexan (clear polycarbonate) panels for the doors. Currently the only holes in the tank are at the bottom (which will be the back wall) for where the aquarium plumbing came through. Here is a photo... There are identical holes on each side of tank, one is the size of a silver dollar and the other the size of a fifty-cent piece. I will cover these with a heavy-duty aluminum screen material. I plan on drilling additional (1/4") ventilation holes in the Lexan doors, which measure 21" x 18" (pictured below). My question is...how many holes do you think I will need to properly ventilate this tank, and where on the door would be the best location to concentrate them? Any assistance is greatly appreciated.