I have been using Lugol's for all of my coral dips.
I started a poll on another site to see what other people were using. Lugol's seemed to be pretty popular for everything, but there were other treatments as well. This is a summary of what people were using.
Zoas - Lugol's and BiFuran (Furan2)
LPS - Lugol's and Flatworm Exit
SPS - Lugol's, Interceptor, and Levasol (Pig and Sheep Wormer)
Fish - UV on the main tank. Check for overall health before adding.