I have a 155 gallon saltwater aqauarium, 3 months old. We started with two black clown fish who were tank raised and no anemone. We added a RBT anemone that they never went to it. We just added two naked clowns and a GBT anemone. The naked clowns shared the anemone and the black clowns would visit and never attacked them and would always return to the other side of the tank. Now the naked clown kicked the other naked clown out of the anemone. We got another ivory bubble tip anemone and the kicked out clown went to it. The one naked clown kicked it out of it too. He swims back and forth and only lets the other clown in at night. What is happening???

The black clowns swim all over although in the last couple days one just kind of stays up and down along the edge and only swims around once in awhile???

Help - thanks.