CeeGee: Regarding the ID's of the above corals, I believe one is a Pavona and the other is a Pocilipora (sp?). The last is Favites. All require high light good flow. One of the best books I bought was by Eric Borneman (it's upstairs and the title escapes me). It has just about every coral ID'd and their captive requirements.
When I had the algae issues, I was told that my LR & sandbed were leeching PO4. I mentioned that my kit didn't show any PO4, and I was advised that it was being consumed by the algae as fast as it was being produced, resulting in a false reading.