Whats your calcium and phosphate levels that would affect the coraline growth. Not sure about the diatoms its rare in a tank 6 months old so I'm thinking many dinos?
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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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