My recollection about the elagance is that you should be careful not to place it in or near the rocks where it could expand and bruise itself against'm. I'd recommend finding a place in the sand if possible with medium to mild water flow. Maybe your rock placement might work if there was no potential to bruise.
I too had one a few months ago. Looked a lot better (expanaded more) when I got it home than @ the LFS
. Thought I had it made for about a month or so.
Then, it died quickly. I'm hearing the same thing as you did - that these aren't doing too well in recent years. I'm hearing they where once very hardy.