Is this tank size too small for a bubble tip anenome ? It has been running now for 6 months. There is plenty of water movement. I know my LED lighting is good because I have the same light on a 60 g cube and an anenome is thriving there. My other concern is that the 20 g tank has an emerald crab in it. I have had 2 unexplained fish deaths in this tank and my concern is that the crab took the fish and may stress out a new anenome. Only other inhabitants are some hermit crabs and 2 PJ cardinals.