from what i know, they need high water flow and lightings. So, placing on the sand may not be a good idea.
I've got one too, but a small frag only, bought at Jireh
bro ettin, don't think it needs a mature tank. mine's doing very well in my 2mth tank
bro seanewbie, i bought it on monday at aquastar yishun, saw two, bought one. maybe you can check it out
i've got one purple anemone bought at aquastar and within a few days my skimmate is purple! damn angry and disappointed
but after a few days skimmate returned to normal kopi-o color byt miraculously the anemone is still purple. no signs of dyed.
just my 2cents. wonder this could help