I don't know that I can be of much help, but I CAN tell you that I had the same problem with torch corals myself. I have a similar setup, i.e. canister, hang-on skimmer, same other corals doing well. I have tried a torch coral on 2 seperate occasions and their heath goes down FAST in my tank. The first one only took about a week to die, the second, a few months. But considering I have had some of my other corals for over 2 years, that's not very good. I have friends that wern't able to keep them as well. I think that they are a lot harder to keep alive, even though some websites list them as easy or moderate corals as far as difficulty in husbandry. It is my OPINION, that those who are successful with them have just the right mix of lighting, water qualtiy and, again my opinion, FLOW. I think having just the right flow for the tentacles to swirl around in is very important. If you like the LPS-type corals (hammmer, etc. ) try a bubble coral. I have a piece that I bought for 80 bucks at my LFS around the size of a baseball, and after 2 years, it will blow up to nearly the size of a basketball. You don't have to spot feed or anything, not to mention, I think that bubbles are almost indestructable. I have come home to find frags of other corals that have fallen into it and it dosn't seem to harm it at all. Just my 2 cents on the bubble, but if you are set on the torch, good luck, hope you find the answer you are looking for.
