Welcome to the site!
First off can we get some baseline information?
- What type/size cage do you have
- What are you using to heat the cage
- What are you using to measure temperatures/humidity
- Do you have anything regulating your heat sources?
- What are your current cage temperatures/humidity & where are these measurements being taken?
- A picture of your setup and BP would be very helpful
How to post pictures: http://ball-pythons.net/forums/showt...with-pictures)
1. Tomorrow i will cover the top of the aquarium. I read that seran wrap works or a towel with foil taped to it. What is the best method and how much should i cover, 3/4?
3/4 sounds about right
2. I should soak him in lukewarm RO water, right? How deep should the water be, and how long should i leave him in it?
It doesn't have to be RO water but it does need to be lukewarm.
3. Will he be scared of the water or will he enjoy it?
Most BP's don't like being soaked. Imagine if a giant picked you up and dropped you in the middle of an ocean...
4. Can I mix in coco fiber into the substrate (fir bark) to increase humidity?
Yes you can
4. How long should it be before he is fully hydrated if i soak him, cover the top, and mist him regularly?
Assuming that your BP is in fact dehydrated you should be able to him back to normal in a few days at the most. A 20 minute soak should do the trick, but I'm not entirely sure your BP is dehydrated. BP's get most of the water they need from eating rodents. A cage that has humidity around 35%-45% shouldn't dehydrate a BP at all.
Are you sure you are feeding your BP enough? (can you tell up what you feed and how often?)
When your BP sheds does it all come off?
Here are 2 threads that I highly recommend that you read through carefully, they cover care and cage heating in detail:
Care: http://ball-pythons.net/forums/showt...ius)-Caresheet
Cage Heating: http://ball-pythons.net/forums/showt...t-Thermometers