<a href=showthread.php?s=&postid=13415885#post13415885 target=_blank>Originally posted</a> by jamesdawson
In most cases, having a little bit of PO4 (and .02 qualifies there) and a little bit of nitrate is actually a good thing (especially as measured by an electronic testor like a Hanna as they take most of the likelihood of testing error out of the equation)
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Your corals will be more colorful as a result of having this small amount of nutrients to feed on.
The exception is if you add aminos as they will substitute these for food. Zeolith systems do this.
James