Yea those kits works just fine it's just hard to tell once you get to low levels what color of light blue it is that matches the light off blue of the card I got tired of guessing and asking my wife to double check finally got the Hanna won't look back
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Current tank---125 gallon mixed reef 60 gallon sump, Reef octopus nw200 skimmer, Rapid LEDs, Maxspec gyre, Mp10s, Fuge, Biweekly 20% WC, QT everything
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