Okay, I too have high calcium...off the chart on my pharmaceutical tests. pH is 8.4, amm 0, trates 0, trites0, sg 1.025. My tank was started in Dec 06, I use safe water, have green star polyps for last two months with no problems, few fish, etc. I haven't had anything die other than the durn blue leg hermits killing off others for the shells. So what is the opinion here? When will the purple arrive?