BTA (Entacmea quadricolor) is the best bet of the clownfish host anemones. Although the hardiest of the 10 or so host species, it still requires markedly better water quality than saltwater fish (most at least). You will want to read the anemone faq's at the top of this forum, also go to WetWebMedia and search there, and Karen's Rose Anemones. That will help you to decide if you're setup is ready for the demands of a BTA.