why do people want to take the risk of it crashing and losing everything?
Sorry about the joke above, couldn't resist. But this is a fair question. There are probably many reasons for people to choose Caulerpa, but it is going out of favor lately. One thing is it is very good at exporting NO3 & PO4. Which is a very good plus. Some recent sudies show that Chaetomorpha may actually exceed it at this though. For myself I have the three Caulerpas I listed above as well as Chaetomorpha. The reason I still use Caulerpa is that there is evidence that it also binds and exports heavy metals. As of yet I haven't seen anything on Chaetomorpha doing the same. Also, with proper husbandry many people do not have a problem with Caulerpa sporulating. So far I haven't gotten it dialed in that good, I've had 2 crashes in the past 6 months (caught in time) but my experience, from what I've been able to determine, is not typical. HTH