I've not dipped plants as of yet, but then again I've gotten a couple algae outbreaks after adding some lfs plants. You cant always see algae or spores, and just be warned I've heard of some nasty outbreaks of some of the worse algaes like Clado that might possibly have been prevented with a dip.
Has anyone dipped with H2O2? I've been spot treating with it with great success, but curious how well it would work as a dip.