Av8bluewater
New member
What test kit for NO3 are you using?I can tell you that my hoby test 0 nitrate and 0 phosphate and my corals do not starves. They are doign very well. I stress again, that this does not mean 0, just lowr than my test can detect.
API for me is always zero.
I prefer Red Sea so I can know a much lower scale. .25-4ppm