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Old 04/16/2018, 05:13 PM   #8
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reefmutt's Avatar
Join Date: Apr 2003
Location: Mtl. Canada
Posts: 7,985
I’ve never had great experiences with gfo either.. not a huge fan... and really, these days I’m not sure how important it is to severely control po4, anyways..
I have pretty much never had po4 lower than .08 and until just recently, my po4 has always been between .14-.24....

Now, it is possible that your po4 may only be up because your n has bottomed out..
Personally I wouldn’t call your p high..
maybe your system is nitrate limited and this is why p has climbed....


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