So now my big question (i may make a new thread) is are there any special requirements for the BLUE colors to come out more on things like a rainbow and superman monti, as well as blue tipped acros? Most colors are better...but blues are still lacking any substance and seem to go brown right after the new blue growth is settled in.
What are your current phosphate levels? Is algae of cyano growing in your tank and if so, what is the growth rate?
This would give an indication of what needs to be done for your blue sps corals as they are amongst the hardest colours to keep alongside yellow and bright purple.