30 is a lot of snakes for most people!
1. To your post Title: Your snakes will die someday - Yes I guarantee it.
2. I would not use a product in aerosol form/spray indoors because it can inadvertently get on everything (including you)-even though it is 'Pet safe' the manufacturers often don't account for cold-blooded physiology.
3. Usually ants are eating something: I would try remove/treat whatever they are eating first and poison bait the rest (on the condition that they are not crawling on your snakes/feeders and/or food).
4. I have resisted the urge to post about 20 memes regarding ants. *Pats self on back*
Good Luck!