anenome question

[Seamonkey]

I purchased a really nice LTA a few months ago. I was told it would be small, Ha. It is pinkish beige mostly with green at the tips which look really nice under the blue atinic light. My concern is this sucker really grew fast. It is gorgeous, seems healthy and happy and my two common clownfish love it. I do not know what type it is and don't have a picture but it might be a condy or malu. Any idea's how big these dude's get. My tank is 20 gallon and has numerous other corals. So far I have given it as much space as I can muster. Plus how on earth would I ever move it, it has a large foot wedged into the sand,
Thanks in advance for any info
PS this is my 1st post, no longer a virgin!