The fish were not effected by the FWE in the tanks I've seen that lost corals.
If the carbon you have is bad.The fish could tolerate some free metal contamination to a point beyond the invertebrates which are much more sensitive to it, particularly copper ,as seems to be the issue with the Kent Reef Carbon from what I've read.
Large water changes can shock things too. At this point I'd do a series of smaller say 15% waterchanges ,run some poly filter or cuprasorb and new carbon;probably wouldn't trust the Kent stuff. FWIW, I've used carbon 24/7 for many years , ROX 8 for the last 4 or so years. In your situation, the carbon should help remove organics including any residual toxins from the flatworm deaths,so I'd be reluctant to stop it.
If the carbon you have is bad.The fish could tolerate some free metal contamination to a point beyond the invertebrates which are much more sensitive to it, particularly copper ,as seems to be the issue with the Kent Reef Carbon from what I've read.
Large water changes can shock things too. At this point I'd do a series of smaller say 15% waterchanges ,run some poly filter or cuprasorb and new carbon;probably wouldn't trust the Kent stuff. FWIW, I've used carbon 24/7 for many years , ROX 8 for the last 4 or so years. In your situation, the carbon should help remove organics including any residual toxins from the flatworm deaths,so I'd be reluctant to stop it.
