Coraline Algae growth

[dirk33]

I've had a biocube 29 set up for a little under 6 months now and everything is going well.
1 Clown, 1 sixline, 1 yellow watchman goby with a pistol shrimp.
1 Duncan coral and 1 blastomossa coral.
Coraline algae had started growing nicely on all of the rocks but I am starting to notice that the growth has stopped and the coraline that is there is starting to turn white.
What could be causing this?
I haven't changed anything that I can think would affect it.

 

[Pushwood]

It's possible that your calcium and alkalinity levels have dipped down on the lower side of the scale. You may want to test your levels and dose if needed.

 

[Jake337]

Same thing happened to me. I had a lot of coralline growing on my lr. Then I added more lr and corals and the coralline stopped. I then changed my salt to reef crystals and am now getting coralline growing again.

 

[Daniel Fishy]

+1 test alk and calcium

 

[CorallineAlgae]

+1 test alk and calcium

This really is key. These must be tested regularly and maintained or the coralline will decline.