About how long should it take for a maroon clownfish to deceide if he/she will house in an anenome or not? I have two diffrent kinds of anenomes. In my 30 tank I have a bubbletip, in my 75 I have a long tentacle. He is right now in my 30 gallon tank with the bubble tip & I haven't really seen him even notice it. He's only been in there a week though.