help with my zoa

[mrtian97]

my zoa colony seems dying on the left side, I have 2 other zoa colonies that are doing fine. my water has phosphate of 0.06, alk at 8 and Ca at 410.

Any idea what cause it? my other LpS is doing fine

Thanks

 

[Joeganja]

What's your ph? And do they have enough flow?

 

[mrtian97]

pH 8.3, decent flow. 120 gallon tank