First, cerastes tend to be feisty but somewhat predictable (basically, you always assume that a strike is going to happen when you get near it). Our cerastes will eagerly come to the front of their cage when they seem me in the vicinity (feedin' time). I would try a 40 gallon and see what happens; if you find that your snake is feeding well, you are all set. If the snake stops feeding, you might go back to a smaller cage; if the budget is the issue, keep the snake in a small plastic sterilite container, with the top secure, and place inside the 40 gallon tank for extra security. Don't think you are cramming your snake in a small cage; baby snakes must feel secure in order to stay healthy....your job is to create an optimal microclimate.
In terms of size, a 30" cerastes is a big specimen; a 5-footer is unheard of and they must be talking about some other species.
Hope this helps. ROb
That sounds great, and exactly the reason why I wanted this species for so long. What is the temperment of yours? fiesty? even thought he is only 6 inches and eating pinkie parts right now I was kinda ering on the side of the 40 gallon just so that he could live his whole life in one tank (poor college budget), do you really think he will benefit from a 20 first, I wouldnt wanna shock the little bugger with a huge enviroment, but I ussually take the bigger side just becasue I feel sorry fro cramped snakes to begin wih. I was kinda leary about this specie to b/c of lacking antivenin...but I dont plan on getting bit, but who does lol... Is there an equivilant that you know of that could work.. all my research says no. Also, from everything Ive read, they get a max of 30 inches.. but somewhere out of the ball park I saw a zoo website that said 5 feet, Whats your take on it?