Algae identification

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Danroo

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Need help with the identification of this algae both the green one and the purple. Was using tap water but switched to RODI a week ago. Already had brown diatoms tank is two and a half months olds. Ignore the photo bombing cardinal

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Danroo

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Blue green algae and coralline. Both great.
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I did brought my nitrates ( 5 ppm from 20) and phosphate to ( 0.25 from 5 ppm ) i usually did water changes to get it around those parameters but not this time. Don’t have any corals atm. I heard soft corals also reduce nitrates and phosphate. I’m not so sure about that.
 
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