Hi there. Any chance you could take a picture or your ailing coral as well as the "brown flat things" (which I'm thinking are red planria, aka, red flatworms). Flatworms in and of themselves are harmless but if you have a bad outbreak, they can cover a coral and block the light from getting to it.
As for your clowns, they're treating your coral like an anemone. It's quite possible that your coral doesn't like this which might be another reason why it's not doing to well.
Also, I would stop feeding the DT's. Neither of your corals will really benefit from it and you're most likely polluting your water. If you want to feed the duncan, try feeding it small pieces of meaty foods about once a week (when you see it's feeding tenticles out). |