Well, I finally took the plunge...
I've been researching this fish for quite while (as can be evidenced by my post back at the beginning of this whole thread...
before the split) and I've finally come to the point where I'm somewhat comfortable taking the risk and have a tank that I feel is large enough to house one.
I, like Paul, have spent a decent amount of dive-time in the South Pacific (dove in Australia, Fiji, and Hawaii, but not Tahiti... YET) and am always drawn to following these awesome fish. What I've observed seem to match what Paul has except I have seen plenty of Idols swim in more than just pairs... I've seen singles and groups of three quite often, but pairs are probably the most common. Groups of 4+ are probably more common when they are juveniles, more for protection since they don't seem to have any other form of protection (i.e., like tangs), but in all of my dives, I haven't personally seen this schooling behavior.
Here are some pics of my most recent Fiji trip (last summer)... as Paul can attest, they definitely are always on the move and don't stay in any one spot for very long. Although, the best way I can describe their natural behavior is a mix between a tang and a butterfly/angel... they are often "hugging" the rockwork in search of their next meal (like a butterfly), but seem to have more of a purpose in their swimming and do tend to swim longer distances before stopping (more similar to tangs).
As for my personal quest to keep one of these beautiful fish, it really came into being more than just a dream late last year when I got the green light from my wife to upgrade tanks. I decided that I would get the largest tank I could fit into our current home (60"L X 30"W X 24"T) and set it up as a SPS-dominant tank with the Moorish Idol as the centerpiece (no tangs that will possibly harass it).
Here's a recent pic of the tank... I wanted to leave some pretty open swimming room for the fish, knowing the Idol would appreciate some swim-throughs. Also, since it isn't the "longest" tank, I decided added depth (front-to-back) wouldn't hurt either, and created the "twin-peaks" look for more swimming room in the middle of the tank.
So that brings us to last Friday, when I happend to stop in a LFS that I frequent and noticed they had 2 Moorish Idols in one of their tanks. As always, I asked them to feed them (I tend to do this out of habit with Moorish Idols even when I wasn't looking to purchase), and both of them ate and actually looked pretty healthy. The smaller one of the two seemed to be a more aggressive eater, so, since I was in the market for one finally, I decided to have them bag him/her up.
Luckily, I've been using my old 60 gallon tank as my QT (with my old skimmer taking care of filtration). I tried feeding it (not being overly optimistic) within a couple of hours of placing it in the tank and it was eating frozen vitamin enriched brine quite nicely. Here it is the first night in the tank...
And here it is just a couple of days after (as you can see, it's streamer has been growing quite fast)...
I did notice a couple of ick spots on it last Monday night, so, although I was planning on treating with Cupramine anyways, I started treatment a little earlier than I'd hoped in order to prevent an outbreak and additional stress on the fish. So far, so good... it is still eating brine (which I feed with a mixture of other frozen foods 3-4 times a day). I've seen it eat smaller pieces of mysis here and there along with small bits of an angelfish/butteflyfish frozen food, but not nearly as much as the brine. During the week, I'll place some garlic-soaked Nori on a clip and rubberband a slice of garlic-soaked scallop to a rock so that it has something to munch on while I'm at work. It seems to be working so far since it has maintained/gained weight in the week that I've had it.
So, my plan is to continue to feed the heck out of it and try to acclimate it to various foods (including pellets), and after my QT (4 weeks of treatment with Cupramine and 1 week with Prazipro) hopefully have a nice healthy Moorish Idol to place in my DT.
Wish me luck!
-Chad