Grape Caulerpa is evil...

[untamed]

[quote]I have read on RC that this is a SPS poison, get rid of it. The only way is to get predator or cook the rocks[\quote]

No..I can't support that statement. I have a lot of grape caulerpa that grows right in my main display tank and the SPS have no problem with it at all. In fact, if it starts to grow near the SPS they are quite efficient at defending their turf by killing the caulerpa the moment it touches the coral.

The statement probably comes from the habit that caulerpa has of dying off 'enmasse' releasing all those tied up nutrients in the water all at once. I would agree that doesn't sound good, but I've experienced it many, many times and my tank has never shown any signs of distress as a result. My system is also quite small, so if there was seriously poisonous my tank would certainly show it.

Unfortunately, the caulerpa never COMPLETELY dies off in these events. Some pieces of it always survive. I would recommend that you wait for one of these events, then attempt to remove the survivors. It will be a smaller job.