yes pc is fine for zoos. and yes they are considered a softie.i am not sure but i think they are a species all on there own. some one i'm sure will come along to correct me if i'm wrong.
zoo come in every form from dark brown to the brightest of blues. the brighter the zoo generaly the more light they need in order to maintain there bright colors. generaly though they will do well under normal pc lighting. growth will be slow and colors will vary but they will do fine.
many find that there dull brown polyps will turn into very bright colors after being put under bright lighting..
the zoos you see in that pic under 20000k MH look so bright green and purple it looks as if they are glowing. but after i brought them home under a bit less light then they had they darkened a bit.
pic number 10,11,3,13,15,and 21 are ALL different zoo's
gl to ya