<a href=showthread.php?s=&postid=6536087#post6536087 target=_blank>Originally posted</a> by DrBDC
I'm beginning to think that the Red Sea phosphate tests never test 0. I have that same problem, I was between 1 and 2. I've changed the phosban monthly, decreased feedings, increased skimming, no nuisance algaes at all, run carbon in a phosban reactor changed weekly. I am stuck at .1.
In testing kits, the only one I take at its word is the Salifert tests. Any others I always figure a range around the results. Does your Red sea kit change color before the 2nd bottle of drops is added? Mine does then after the 2nd drops it doesn't change. I'm not sure if that means anything since I don't know what is in each bottle so I'm not sure of the chemical reaction to determine. I get my tests at thereefstop.com but all of his suppliers are out of the phosphate tests from Salifert at this time.
