OK so I got a barely used 2005 Marquis Destiny spa. It has an ozonator and uses spa frog bromine and mineral cartridges. Can I switch to chlorine? Since I don't mind the smell of chlorine I personally don't think bromine smells less it's just different.
How do I clean the plumbing since it has been drained and sat for a period and I don't know when the last time that was done is I definitely want to start fresh. Can I just shock the heck out of it or do I have to buy one of those chemical packages advertised for biofilm and plumbing?