Coralline bleaching

[Bartman]

I just replaced my Hamilton 175W 10K bulbs with XM 10Ks and after 5 days it looks like I am getting coralline bleaching. Is this common with new bulbs?

[Ruth]

I have had the same thing happen to me. IME coralline algea grows best under lower intensity light - particularly VHO light.

[Joe Reefer]

Make sure your mg and ca levels are on par it will come back in time.

[Bartman]

I have such beautiful coralline too........ :(