RBTA.... help (too little too late unfortunately)

[doch]

So... I've apparently done something wrong. My new RBTA has died. I'm VERY upset about the whole situation. I have no idea what I did wrong. I'll fill you in on the details... maybe someone out there can tell me where I screwed up.
90gal tank been set up for about 4 months now. Chemistry is all good. Maroon clown hosting in RBTA (while it was alive) 260W power compact on for about 12 hours/day, then lunar lights on 24 hours/day (probably no effect, but why not mention it) I put it in the center of my tank and it tripled in size over the first day. Hardly moved at all (maybe 2 inches or so. Day 2: Still huge. Day 3 came home in the morning (before lights had come on) and found it all shrivelled up... to the point that I thought it was dead then. Left it be as it was still attached to a rock. It stayed shrivelled up all day until the lights were about to go out, and then perked up (not as big, but gave me hope) Day 4 EARLY in the morning, woke up to find it still looking OK. Came home from work to find him shrivelled up. Day 5 about 7pm found it looking decent, but found 2 very distinct discs (couldn't tell if there were 2 mouths. I was relieved thinking that this whole situation was due to it splitting!!! Day 6 Shrivelled. All evidence of second disc gone, RBTA had moved to back, dark part of the tank. Day 7, came home to find it on the ground shrivelled (but still red) and not looking well. Reached in and found there to be a hole right through it. Clown fish still very protective of it. Disposed of it.
Anyone out there that can fill me in I would greatly appreciate it.
My only theories are light and pH fluctuations caused problems, but realistically, I have NO IDEA what went wrong. An RBTA is something that I VERY badly want in my tank. Hopefully I can try again... with help maybe????

Thanks for any help.