branching frogspawn? also hammer ?'s

[coral acquisition]

hi read something about a branching frogspawn. is there a difference? is there just a regular frogspawn?

i just saw this nice frogspawn at the LFS and i want it to grow as much as possible.

also i've seen frogspawns and hammers that are really green. are they a special breed or all of them have the potential to get really green?

can you put then together in the tank? should they be separated?

thanks