Ideally you want 1.5-2 pounds of LR
per gallon capacity of the tank. You have plenty of LR
now and could add base rock to make up the difference. Base rock is dry coral rock. It becomes live (hosting nitrifying bacteria) over time. I got a 50 pound case of it from thatfishplace.com
for about $1.00 per pound. It was almost pure white but now you can't tell the difference from the other rock in the tank.
Your tank will go through several stages as it cycles and matures. Different diatom and algeal blooms will happen over the first 6 months - year. That 5% purple will become 10%, 20%, etc over time.
If your water parameters are coming in line you may want to think about adding a small clean up crew to start; some snails are a good choice.
You can add a Mg
Magnesium test kit to round out your testing. On this forumn and others, Salifert test kits get high marks. ALL strip tests get very low marks.
Have you seen the ammonia, nitrites and nitrates spike and then come down to ZERO?
Drs. Foster and Smith sell small starter packs of soft corals -- http://www.liveaquaria.com/product/s...cfm?pCatId=751
I think they are a bit pricey but they put it all together for you.