I am looking at adding more aquatic life to my saltwater tank. Would it be a bad idea to put an anemone in a 20g tank? I have 20 lbs of live rock, 2 filters, a 50/50 lighting system and a few other things. Currently, I have a black and white striped damsel, a clownfish, a pulsing Xenia, a purple mushroom, and a couple zoanthids. I want to add an anemone for my clownfish, but not sure if it would work in my tank. Also, I don't really know what types of anemones are best for a small tank. Any suggestions?