Hello and welcome! Here are my thoughts:
I was told my little corn is 11 months old and she(Phoenix) is around 18 inches long. I have seen on here people suggesting feeding the younger snakes every five days instead of every 7, which is the best?
The frequency of feeding depends on the size of food she's eating. The larger the food item, the longer it takes to digest. As a general guideline I feed:
- Pinkies, 1 every 5 days
- Fuzzies, 1 every 5-7 days
- Small mice, 1 every 7 days
- Medium mice, 1 every 10 days
- Adult mice 1 every 14-21 days
However that can safely tweaked if they appear to be too skinny or too tubby. Once they're on adult mice, most won't need to eat anything larger for the rest of their lives.
Also I live in a semi desertish place so do i need to mist my snake?
Unfortunately I live in the UK and don't have this type of problem! Hopefully others will be along with practical experience and advice.
I am also having trouble with the heat. I have a under the tank heater and a lamp as well because neither seem to be doing the job on their own. The pet store owner told me i need to keep the warmer side at 90 and the cooler side at 80 but it is so unstable.
I'm afraid you've been given less than ideal advice there. The warm side floor surface needs to be around 85 and the cool side floor needs to be in the low-mid 70s. 90 for any length of time can actually be dangerous for Corns if they can't get to a cool enough area and get away from it.
You need to make sure that you're firstly measuring the temp at floor level, as that's where the snake is. There are a range of views on the importance of air temp in the tank, but I see it as much less critical then getting temps correct where the snake is actually experiencing them.
Secondly, are you measuring the temps with a digital or infra-red thermometer? The plastic dial-type or cardboard strip types can be wrong by 20+ degrees either way and those are the ones normally supplied with starter setups. My nephew was given one with his first Corn setup and it didn't even move when the undertank heater (UTH) was accidentally unplugged.
If you have both a heat lamp and UTH and neither have a thermostat or dimmer to regulate them, the chances are the temp on the floor in the tank is very much hotter than you think. As a very rough guide, 85 is around 10 degrees lower than human core body temp. If you put your hand on a tank floor which is at 85, it will barely feel warm to you. If it feels hot to you, then the surface will feel scalding to the snake.
We'd usually recommend one or the other. I use a UTH under one-third of the tank, controlled by a thermostat. You can use a cheaper dimmer as an alternative controller. Thermostats cost more but work better in rooms where the temp fluctuates a lot, as dimmers need to be turned up/down by hand. Plenty of folks here use heat lamps successfully, but again they need a controller and they do have the effect of drying out the air in the tank and lowering humidity, which is not ideal for your location. Air con can further dry the air.
I don't think she/he has been held much because she shys away a little when I go to pick her up, but is really curious and explorative when I have her out. Is it natural for them to spend most of their time hidden?
Absolutely normal, yes. Corns in the wild are active at times of low or no light - dawn, dusk and overnight. You'll rarely see her out and about during the day, even as an adult (although there are always exceptions which love to roam!).
New arrivals are especially nervous and inclined to stay hidden and out of sight. They gain confidence as they get used to you and grow, so you could well find that she becomes more bold as she gets older.
As for being shy of handling, my gang are always shy of being picked up to start with. It's just the instinct which tells them that something is trying to eat them! However most will calm down once you have hold of them and they realise that it's "only you" and they're in no danger.
The tank is near a sound system could the viberations be scaring her
They're very sensitive to vibrations (they don't have ears as mammals do and so are evolved to sense and experience sound through vibration) so this might be a factor.
and should she be cool to the touch when being held.
Yes absolutely. As above, their ideal max is below human core body temp. They will usually feel cool unless you've picked them straight up from a heated part of the tank floor.
These are all excellent questions for a new owner - thanks for taking the time and trouble to ask. Looks like your little one has found a great home
Hope I've helped!