i go to ocean aquarium in pleasantville quite frequently, but i didnt purchase the xenia there. i actually bought it at a place called "aquarium authority" in marlton about a year ago as one tiny stalk. that place closed about 6 months ago. no secret to growing...just light skimming. i found that when i added cheato to my fuge the xenia slowed down. recently i took a ton of cheato out and i noticed a huge jump in the growth of the xenia.