Live Rock

viper_930

Active Member
Does the red patches rub off easily? If it does, it is cyanobacteria, bad stuff. Get some more powerheads, check nitrates, and/or phosphates.
If it doesn't rub off easily then it is coralline algea. Good for looks, good stuff.
 

viper_930

Active Member
It is algea. It just grows if the alk and cal levels are kept good. Yes, it is worth more with the coralline.
 
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