I've decided to go for a sarcophyton as a focal coral in my tank, and have been reading up on it. I understand it secretes terpenoids which affect the growth of other corals, especially hard corals which i intend to try out in time. Am I right to say the best place for this dude is close to the overflow to reduce the amount of toxin in the water column ? . . . Now how to get rid of it in the sump . . . Other than charcoal are there any other ways to neutralise this chemical warfare before it gets pumped back into the display ?