Leather Cabbage with Flat worms

[Nebthet]

After the six hour period, I would put some carbon in the water near your water movement source to take care of some of the toxins from the flatworms, but to be on the safe side, to ensure you get as many of the flatworms as possible, I would leave it in the flatworm exit over night. The product should not hurt your corals at all. It is the toxins from the flatworm deaths that you have to worry about. When I treated my 20L tank, I had my hammer, torch acans and sps all in there and none of them were adversely affected.