Hopefully some of the mods/vets will provide some insight because I'm curious as well...
...if you're getting an RO
system, why not just wait a couple weeks and do some 20%-25% PWC
with the RO
water before throwing a coral in? That way, majority of your water should be of much better quality than you currently have in there.
1 last question....Are you getting the DI
canister with the RO
system? It's not expensive and it ensures you get all impurities stripped out for truly pure water. Just FYI...