Manny, and others, thanks for the kind comments. DanConnor, thanks for that award!
Responding to some of the many thoughts and questions:
My mandarin is definitely eating, not only foraging in the rocks and sand, but often eating a wide variety of food I put in the tank. Whether it is benefitting, I wouldn't know, but by appearance and activity the fish seems healthy and adapted. I will try to be sure any additions to the tank are not pod or otherwise competitors; thanks for those suggestions.
I do have a terrific blood shrimp, which has also been in the tank since near inception, and it acts regularly as a cleaner. The tang, angel and butterfly all lay sideways and find their way in the caves to position themselves for what look like cleaner massages! The cleaner has always eaten well too...peers out often during mealtime.
I have never given thought to a refugium and will try to learn more about it. I got into salt on the notion (amply promoted by LFS, but to some extent seemingly confirmed in some research I had done...including the general premise of Paletta's book) that with live rock, live sand, the advances in equipment, etc., things had become much simpler and more forgiving in the hobby...perhaps along the minimalist lines. I was given to believe that even making it a reef tank wasn't much more complicated or time-consuming. Combined with my son's enthusiasm to see me give it a try (we had freshwater tanks for years), I probably made a bit of a leap.
Initially, I didn't have a skimmer for that reason...was told/heard it really wasn't necessary, particularly if I stick to relatively hardy fish and corals. Anyway, I later decided a skimmer would be worthwhile, so I got the Seaclone...I may have been somewhat misled about it's quality, though I think it's at least a good start and may not have gotten one at all if it was going to be far more expensive or complicated. It was easy to set up, and is simple to use and seems to be working fine.
Hopefully, I won't have the crashing snow problem...Ive cut back on the
B-Ionic to only using the calcium part and only 3 times a week. I will keep testing and be on the lookout.
In terms of the UV light, is there a total consensus that I should get rid of it?...that surprises me a little...I thought from all I had read and heard (albeit after I got it, at LFS' urging) that there seemed to be varying views, and that on balance for what I have overall it was probably good and at least not harmful. I would be interested in any further thoughts on that.
Sorry for any redundancy, or if Ive completely misread anything. I am a newbie, and I am sure you appreciate that there's an awful lot of information to process!
Thanks, all.