Green Coralline Algae

[leighton.bingham]

Wondering how long it take normally for the green to turn purple? My tank is about 2 years old. I had just redone my scape about a month ago also. So there is white.

 

[Aquavaj]

Since you already have some coraline growing it shouldn't be more than 2 months if your alk and calcium remains steady. When I upgraded from a 90g to 180g I added more rocks that were completely white and in 2 months they look like the old rocks that were 4 yrs mature.