I've had my corn snake for about a year now. He is around 2 feet long and is currently living inside a 20 gallon long terrarium. Petco is currently doing a 1 Gal = $1 sale and I was thinking about getting a larger tank about 40-55 gallons. Are these too big for a 1-year old corn snake? $55 for 55 gallons is a EXTREMELY great deal.