good or bad??

[aceiswild7]

i got a piece of live rock which had an abundance of hair algae growing on it i know that they thrive in poor conditions but it isnt growing in my tank im just curious if just having it there is detrimental to my water quaility i originally got it for tangs and angels to pick at which they do occasionaly but hardly make a difference
thanx

 

[artskoi]

I got Calupera for my tang and angel to eat.They pick at it but not eat all.If you feed them enough other foods as well as Romaine or Sea weed they leave this alone.As long as the hair algae doesn't take over the plant will help consume Nitrate.