Quote:
Originally Posted by airdrie5
I am having some serious measurement reading issues on my refractometer, hydrometer, GHL Profilux 3.
First I calibrated the refractometer with clean ro/di, freashwater (TDS 134) and set it at zero..
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A TDS of 134 is really high for ro/di. It should be closer to zero. It could be throwing off the calibration.
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72 gal bowfromt mixed reef sps dominated, 25 gal mineral mud type sump/refugium Skimmerless
2x250 14000k phoenix hqi 2x96 pc actinic, 50x flow
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