Cooked Coraline

[cveach]

I recently added a 250watt MH over my 75gal reef, with a 12,000k bulb. Some of my deep purple coraline on the higher rocks is turning white on the edges. How far will this progress ? Will it just be up top?

 

[luke]

How long has the light been on for? I would say you could lose all of the coraline on top if it does not like high light. This really isn't a problem though, because new higher light stuff will quickly replace it. It could aslo be the growth edge of the coraline, in that case it is growing.
Luke

 

[cveach]

I run 220watts of VHO for 8 hours with the MH running for 5 hours.

 

[b_ball12_99]

I agree, if it dies a differrent kind will replace it. There are several types of coraline.