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Daddy-o

Aquarium Advice Activist
Joined
Oct 14, 2011
Messages
135
Got a few things happening in the tank that are concerning me.
1) what is the red stuff growing on my rocks?
2) why is my green coral not thriving? It used to open up more during the day and especially when i put shrimp in tank to feed.
3) New leather is dying.

pH is around 8.2
Salt 1.027
Nitrites zero
Nitrates around 5-10
Last water change was 2 wks ago. Approx 20%
 

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The red on the rocks looks like a dark coralline algae to me. I have a lot that color in my tank.

What kind of lights do you have?

I'd do some water changes, check calcium, kH, and magnesium to see where that's at as well.
 
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