water conditioner

Does anyone still use a water conditioner like seachem prime in their RODI water? I’ve been using at a safety i case RODI doesn’t do a good job. Curious if I am causing more harm than good trying to be perfect. Appreciate anyones thoughts.

I've heard API Stress Coat and Seachem Prime aren't really compatible with protein skimmers. What would another option be other than getting a reverse osmosis filter? Are there any other chemicals that remove chlorine and other bad chemicals that won't mess with a protein skimmer?

So I'm having a suspicion that my LFS might have metals or chlorine in their water. I finally decided to order an RODI unit, but it's going to take about a week until it gets here and I can make new water. Should I use water conditioner or wait it out? I've never used it before, but corals...