[sgarron]

I switched to reef crystas when I started my 180 and have had low calcium and magnesium ever since. I just switced back to red sea coral pro and my levels are on the rise. I tested a fresh mix of reef crystals at 35ppt. and found 320 calcium and 1125 mag. using salifert and elos tests. Using the same tests I got 420 cal. and 1300 mag from the coral pro. Maybe it was a bad batch ( last 6 buckets?). But I don't think I'll be using rc again.