Brown Algae - Pics Added

[Delphinus]

Originally Posted by Jaws

When you say no light, do you mean no light at all or just turn off the MH's?

No light at all is better.

Originally Posted by BCOrchidGuy

the last one says no light for 24 Hrs etc etc.. hope it helps.

FWIW ... I was chicken to try the lights-out thing at first. So I first only tried 24 hours. Nope, only dented them, they were back full-force within a day or two. 48 hours was better, but still didn't cure it. Go without light for as long as you can possibly stomach it. It's hard, it's really hard, your impulse is to let the lights go back on.