Question on the original subject... I just got an LTA from DD this morning, I drip acclimated it for 3 hours and I just "planted" it in my tank. I too was having the same issues as the OP, getting it to sit down in the hole, with the same 30" deep tank problem. It took a snorkel to be able to reach far enough down, but was able to do it with a gloved hand... I swept a hole open and gently pulled the nem in, then using my thumb to gently hold down the anemone, i pulled sand back all around it. Its mostly buried and its in a sand pile probably in the neighborhood of 5" deep... question is, now that its mostly buried, will it pull itself in deeper? its kinda deflated still from shipping, although it looks very good, but once it starts inflating, I'm sure it'll have a decent bit sticking out the top of the sand...
Edit: that didnt take long... it seems to have unburied half of itself. I dont think there's too much flow now (2 MP40W turned all the way to low in a 220), maybe its still just ticked off from shipping. I'm going to leave it until the lights come on and see what it decides to do with the other half of itself.