06-20-2007, 08:39 AM
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Personally we use Chaeto in our sump it doesn't reproduce sexually, it isn't invasive and hard to remove, and it isn't highly toxic. It also grows quickly.
If you wish to keep the Caulerpa here are a few suggestions:
NEVER grow it in a show tank! (it's little rootlet thingies invade your hard corals and kill them)
If you have it in a refugium, trim it regularly (no less than every two weeks) and keep the light on 24/7. Allegedly, disruption of the day/night cycle, and keeping it from maturing fully inhibits it going sexual thats when you have problems.
There are plenty of people that grow caulerpa in the refugium. As most marine organisms, you just have to understand what you're dealing with and minimize the risk.