This would be a good idea if someone else with a tank not quite at the perfect
stage as Reefs tank could try dosing Phyto.
Because last time i saw Reefs tank which was a few years ago i could not for the life of me see how you could get corals growing any better.
I think there must be a limit on how fast corals can grow and if your tank is doing well then adding Phyto wont improve the results any further would it.?