coraline algae

[acasden]

any thoughts on what can cause coraline algae to loose color- just not as deep a purple and on some rocks more of a burgendy color? my chemistries are on target, maybe ca a little low . ?

 

[stubbsz]

Change in lighting will change the look of Coraline algae. My shift to Metal Halides from PC made a lot of th bright purple go away, however, a different bright purple has replaced it now.

Also, an accidental rise in salinity will remove a lot of the color. I know that from personal experience.
-Adrian

 

[mr_X]

check your ph and alk. my alk was out of whack once and the coralline turned white.