We have a 156 gallon tank. We bought 2 juvenile clown fish and a week latter an anemone became available. The anemone keeps moving to one spot behind the rock and I have tried to chase the clowns to it. They live in the back right corner and will have nothing to do with it. I bought a frogspawn and put it close to them but they ignore it also. Any suggestions about how to get my clowns to live with the anemone?