Out of curiousity, and to save you headache and heartache in the near future, what type of anemone was this?
I ask, because, a tank specifically built for softies, is likely to have a lower powered lighting scheme, and be very fortunate to support even a bta. BTA's (bubble tip anemone) are pretty much the least light demanding of the hosting anemone's.
I don't want to assume too much, but, it sounds like, in additon to your tank being rather new, you may still be learning things about this hobby at a fast pace. An anemone may look like a softie, and is pretty darn squishy

but it's by no means in the same group of animals that are commonly referred to as "softies."
I wish you the best, and, I admit, I'm glad someone else bought the anemone

Now you have time to let your tank mature, do some research and make a decision that you'll enjoy, rather than regret
Also, if your looking for something to host your clowns, in a 55..... Frogspawn is one of their favorite non-anemone's.