Dark colors for back glass

[paphater]

For whatever reason I've never been in to zoas that much but with my new tank that may change. I'm wanting to cover the back panel with zoas, primarily blue but I'd also like to do bits of color in certain sections. So my question is in terms of growth rate what would be some good options for both high and low? The lighting will primarily be SB reef lights and the tank will have a 21" water depth. I know growth rate will depend a lot on my tank so I'm just looking for generalities.

 

[cracker]

sounds interesting. I'd like to hear what others say