[Myka]

My Grape Caulerpa did the same thing yesterday. It had pretty much taken over my nano (poor tank has been ignored for a few months), and I stole the heater from the tank overnight when I broke another one so the temp dropped 4 degrees. That's enough for the Caulerpa to have sexy time. The Zoas were all shriveled up, the fish had clamped fins and were hiding, it looked like someone poured milk in the tank. It was actually quite foggy seeing as the tank is so small. I did a 50% waterchange, no carbon, fish were happy by the afternoon. Today it's clear and the Zoas are most of the way happy again.