Welcome to the world of King snakes... personally Florida kings are my favorite ssp.
i've owned cal kings, speckled kings, desert kings, black Mexican kings, Apalachicola kings , and Florida kings... i gotta say all have the tendency to be aggressive as neonates... with handling they calm down very fast.
Enclousre:
how many kings snakes are you tying to keep? one? if so a 30gal is more than ideal for an adult king snake... if you plan on getting a hatchling to raise up... you may want to start off with a smaller enclosure and step it up as your snake grows (plastic shoe box---> 10gal---> 30gal)
Special Brands:
i can't say i have any special brand of king snake products... really i don't think i buy any thing extra for my snakes.
With some bedding, a nice hide (cave), water bowl, maybe a rock (for shedding) regular feedings ( every 3-5 days) you snake should do fine
hope that helps
~ZF
