So I went to my LFS today on a mission to pick up my first fish after starting my tank a few months ago. I have a biocube 14g and I told the fish guy what I had and that I was interested in a coral beauty. He said that it would be fine in my tank and that it only gets to be around 3"+. So when I got home I looked it up online and live aquaria has it as a min. Of 70 gallons. What gives?