My friend has a 29 BC and cannot seem to keep zoas. For some unknown reason, any she adds seem to melt for her within a week. Her tank is doing well otherwise. She did have a flatworms outbreak a few months ago; she did two rounds of FW Exit and killed them, ran carbon, and did massive water changes. But I would not think it would be a continued factor.

Any thoughts? I am not a zoa expert. Any advice is appreciated!