go very slow Andy! the Radium on Agro ballast are very very powerfull
if it was me I keep you fluo on same shedul you have now. Then begin with 1/2 houre MH a day with increase of 5 to 15 min each day at 5 houre take a couple week break staying 5 houre a day and restart the increase to your desire end IMO 8-9 houre is enought. the slower the better!
When you burn a coral it is to late and he take forever to come back.
So be very carefull or you will bleach coral. I compare this if you get a sunburn but continue to go out every day under the sun....you will continue to burn burn burn ..... but if you take the time to adapt it is fast
and no pain
good luck and keep us update