xabo January 5, 2019 Share January 5, 2019 Using Hanna Phosphorous ULR and got a reading 4ppb. Using conversion table reading translate to 0.012ppm. Is this high? Thanks Link to comment Share on other sites More sharing options...
DFR January 6, 2019 Share January 6, 2019 No, that is actually pretty good. However, if you started with dry rock just be careful because if cyano takes hold in your system it’ll be a pain to get rid of as it does well in lower nutrient systems. Link to comment Share on other sites More sharing options...
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