green polyp

[kostadin77]

HI i had buy a green polyp it was open for a week and then close! i dont have strong lights and i place it on rock on the front bottom of the tank . it broke on 3 peaces after a week and close up ! I am looking for any advice what to do ?
Thank you!

 

[ant123mon]

Any pics

 

[Reefpuck]

Need more information than that. Pic would help to.