Hi everyone! Hope you are having a good start to your Friday

I have a questions I am wondering about.. and it may sounds stupid, but oh well! haha
We are going to a very well-respected resort in Puna Cana.. They bring in their own water for ice and bottled to drinks.. I know not to shower with my mouth open and not to brush my teeth with their water.. but how about the pools and stuff?? Are those completely safe?
Also, what kind of medicine did everyone take with them? Other than multi-vitamins, pro-biotics, and stomach meds (pepto) to take are there any others you reccomend?
Our travel agent had mentioned something about some kind of medicine "incase we were to get ill while there" and wasn't sure exactly what kind of illness you was referring to.
THANK YOU.. So much