hey everyone! i had a hammer coral for about 2 months now. i have 3 450 power head in the tank, but i notice it barley getting any movement from it. sometimes it is still or just clown swimming in and out making it move. i didn't really notice it till now. my question is is it ok for it not to have any movement sometimes. it bin like that for a month and a half but it look really healthy and opens up no problem.. thank in advance..