I have taken the plunge and bought a 200L reef tank from a friend who was moving overseas. I have kept marine fish successfully for years but an unexperienced with corals and other inverts. The tank was going great for about a month with major growth in soft corals and happy elegance and anemones when BOOM! three separate small colonies of torch coral were hit with brown jelly. I followed the instructions in The Reef Aquarium and dipped it, no joy, cut off affected sections, still no joy. I was unable to save it. At the same time, my leather coral started to look unhappy. I have seen it slough off before, but this was different. It had some brown on it which I siphoned off and a few yellow spots with a small crater. Some polyps are partially extended but it is still not happy. I have another tiny leather coral which appears to be on its way out. Temperature has not fluctuated, pH, ammonia, nitrates all fine. Other corals appear fine. This aquarium is so beautiful and such a blessing. I don't want to lose any more. Help!