ICP results came in from ATI today. It was my first time using ATI's kit, mostly because I liked how they included a vial to test RO water, NO3, and KH.
Glad to see my RO water is spot on, but the results of the test caught me off guard.
A week and a half prior I had submitted a triton ICP, which i had been using regularly to dose some of their products. It came back with expected results:
View attachment 72824
-low zinc
-low flouride
-low vanadium
-PO4 levels >1.4
The ATI ICP came back with similar results except for my phosphate levels
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I had always wondered how the Hannah checker and salient could be so off and took the triton results as the accurate reading...after all, its an ICP test done by a lab that performs these regularly right? Believing so, I had it ingrained that although the levels I set on the trident NP and checkers read low and trended it as such. Main export for PO4 had been the algae reactor and a small amount of GFO and it seems I've been running it way too low.
Originally shooting for 0.06-1.0, its been kept way lower. Glad I cross referenced it against another test before I lost more coral. Sucks there was a casualty, but im chucking this one up as an expensive lesson. Elevated NO3, low PO4...even a small temp swing or a change in water clarity from changing out the carbon could have decimated things.
Rather than dosing or doing anything knee jerk, I took the GFO off line and upped the feeding slightly.
ICP wise, I have to say, I like ATI and their layout and may be switching over.