Im sure they have... I just have not been up w/ the times I guess.....
As far as the Phosphates... I was going off of the Color card that I got from the API test...It started at 10, cause I had a dead invert in the water for a few days... Then I did the water change and it went to around 7 based on the color card, and now it is at .10 based on the same color card. I have never really tested for Phosphates or calcium etc... Just Anomonia, Nitrates etc....
Im learning more and more each day about PH levels, Calcium level, etc....
I forgot to add that my ASM G2 skimmer has been pulling out a full canister of blacker than usual crap.....Every Day...w/ the use of this Red Sea Product....