<a href=showthread.php?s=&postid=10492937#post10492937 target=_blank>Originally posted</a> by RokleM
What was your phosphate levels before you used it? How about right before the three month mark? Many people have "undetectable" phosphates using a number of test kits, that's why I ask. Understand, I'm not discrediting what you've stated, just wondering if the levels are accurately being tested.
A good example, I have 0 phosphates, and always have with a Salifert kit. However, I've found the Elos to give me pretty good variations depending on the age of my Rowaphos.