I'm wondering if it's time to move my 2012 Spider/Mojave ball into a bigger cage. He has been sharing this divided 20 gal with my smaller male. He's about 28" long and approaching 800grams. Since he began feeding on rats in February he has been packing on weight. He still fits well into both warm and cool hides, and uses both regularly. There's not much room in between hides, but there is still a perfect 80/90 temp gradient, 78-80 ambient, and 55% humidity.