Ok, thanks a lot Mark.Regular airline tubing works just fine
"Air tubing" is rather generic and does not specify what the tubing is made of. It could be anything from "plastic" to silicone, PVC, polyurethane, fluoropolymer, thermoplastic elastomer, etc. I would highly recommend the tubing you use for a peristaltic pump is a high grade silicone rubber. These pumps beat the crap out of the tubing and silcone base tubing holds up the best. Google peristaltic pump tubing and you should be able to find something on line for a reasonalbe price.
Thanks a lot Paul, always very helpful.Additional info HERE.