you should be fine. I have had 1 pair of oclownfish for 9 years I believe and than recently introduced 1 more ocelaris about an 1in and a half and they would pick at him but he had enough room to escape and since than about a couple months has more than doubled in size and they all three swim together. The 3rd ocelaris which is not bonded minds his own buisness and really peaceful. Than when I decided I am upgrading a tank I had a pair of black clarki clownfish and introduced that pair into the other tank and they still bicker a little bit but it is tolerable. this a 180 gallon reef with 5 clownfish with 3 different species lol. They are all happy. This tank also does not have an anemone.