Okay question... I am not sure if this will work. I have a 150 tall. In it I have a front, some peacocks, a hap or two, boryi, and added two bichardi... what does everyone think about adding a few shell dwellers... I have half the tank setup with sand. mocking the type of end of reef area that they are use to with rock and pants moving into sand on the other... Do you believe it will work? I have a good place to get them on good deals... since I work at a great LFS part time... gotta love the discount... so please give me your thoughts and I will consider all prior to my final decision I will add. forgive any misspelling...