I am lighting it for 22hours a day - have heard mixed opinions on the lighting schedules to prevent it .
Thanks 459b , reassuring , I find it more attractive than chaeto , as I can feed it to my fish. Did all of it go sexual at once , and how did you restart it ?When i started the hobby i had a large refugium with plenty of caulerpa and it went sexual three times, with two different species. The water went murky for a bit, and thats about it. There was no mass death or anything like the hype on the internet suggested.
What seemed to help (and i havent had it go sexual in ages) is to keep it trimmed. Rather have many short pieces instead of a few long strands.