Hi Kontron,
I thought I would share a few of my thoughts.
1) Claci sand. I wouldn't use it for any bp, or honestly I wouldn't use it for most reptiles. We have had many of geckos’ come through that were impacted by this “digestible” substrate. In addition, it is much easier for bacteria to hide and grow thus causing scale rot, stomatitis (mouth rot) and other bacterial infections.
2) Cat collar. I wouldn’t recommend using any cat or dog products in the treatment of your pet reptiles. Cat fleas and ticks are a completely different species then a snakes mites and ticks. Plus cat collars can carry an insane amount of pesticides that can be very harmful to your herp. I would (and I know you don’t want to hear this) take apart the whole enclosure and thoroughly disinfect it, before introducing your ball python to his or her new home.
Just my 2 cents
Rusty