Hi Sean,
Glad to hear you want to get a corn snake! I just got mine (Corny) at the end of May and I totally love her. Its my first snake, and according to my bf, much more friendly & active than other snakes like boas & pythons. Corn snakes are almost always great eaters. mine will take a fuzzy while i'm still holding her!
Anyways, I'm kinda new too and not a breeder, but here are the methods I've beed using and Corny has never had a problem:
I have my one snake in a 40 gallon breeder (20 gals are fine tho!)I want to "pamper" my snake, and I'm a little wacko too, so I will probably get her a larger cage when she is full grown.
My 40 gal is from glasscages.com, arcrylic, and is 3 feet long, 1 1/2 feet wide, and 13 inches tall. I use a silver clamp-lamp to house a 60 watt bulb which, from 13 inches away, gives me a hot spot of 85-90 degrees. I also give my snake a 2.0 %UVB striplight; although snakes don't NEED UV, it can't hurt, and there are experiments that say UV-exposed snakes are healthier, heal faster, and probably happier.
For my substrate I use carefresh bedding. it is found in the "small animal" department of petco and is gray, recycled material. My bf uses reptibark for his tegu & likes it, but i think corny prefers the softness of Carefresh.
I have a plastic vine, some driftwood & coral (bleached & rinsed of course!) as well as a hide cave in her hot spot and one in her cool spot. she also has some driftwood climbing sticks. My waterbowl is in the middle of the tank (actually i am needing a bigger one since your snake should be able to soak in it)and I have a screen top with no clips as of yet. But get cage clips or a velcro-on cage top.
If you are using tap water, make sure you put Reptisafe in the water to neutralize the chlorine & heavy metals.
I found it helps to have 2 thermometers in the tank, both about at ground level, at opposite ends, so you can measure the hot & cool zone. My cool zone is 74 degrees.
I also have a humidity gauge placed in the top-middle of the back wall. I live in CT and my humidity is usually 60% in winter and 80% in summer, which is great for corns. If you live on the west coast where there is no humidity, you may want to mist your tank.
Also, feed your snake 2 times per week as a baby and 1 time when it gets larger (mine is maybe 22 inches with a diameter of 1 1/2 cm, i feed her every 5-6 days). Be sure not to feed it right before you turn its lights off for the night. Your snake needs heat to properly digest the food, so either feed it in the middle of the day when the snake is warm & can continue to be warm, or feed it in the evening & plan on keeping the lights on an extra hour or two. Also, don't feed it first thing in the morning when you turn the lights on cuz the snake may be too cold to eat! this can lead to regurgitation or food rotting in its stomach, poisoning the snake!
Hope this helps!
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Melissa and Corny