why are you trying to alter your pH and what are you using to do so?
i wouldnt touch it esp in such a small tank. pH swings will be to large and will make matters worse.
why and how is your Ca 650? i think your testing incorrectly. what test kit do you use? what salt mix?
i find it hard to believe your Ca is 650, hasnt precipitated and
your alk stayed at 8. do you have a mag test kit? Ca effects Alk which effects Mag which effects pH, they all work in tandem with eachother.
the phosphates would most likely give you a false reading if algae is present. the algae would be using these nutrients so a test would prob. read 0 when chances are they are still present.
do you use RO water?
do the PCs have actinic bulbs with them? the actinics will help make colors "pop" more. regardless defferent tanks have different lights which will make colors of corals look different all the time. you may love something at your LFS, buy it, take it home to find it looks tan or brown under your lighting (or a different color for that matter) or you may buy something brown and find it colors up for you under your lights.