We have a 20 gallon tall tank and just lost a tank raised clown(from LFS) :( He has been swimming lathargicly the past week or so and would stay towards the top of the tank. I found him next to a pump this morning. We have 2 medium sized stalks of Anthelia, and a round rock of Zoa's. Would a paired up clown and anemonie be a good addition? There is only an angelfish, snails, and hermits in there now.