Newly-rooted clones should be treated like seedlings, and personally I wouldn't put them in something like FFOF right away.
What are you using to adjust the pH of your tap water? In almost all situations, tap water does not need to be adjusted for use in soil- and peat based soils tend to drop over time anyway, so 6.5 is often shooting yourself in the foot! Go for 6.8-6.9 to water any peat based medium, unless you KNOW you have a problem with it.