How fast is fast in growth for SPS?

[mitchelljared]

Just curious when people say "oh, this grows really fast"....how fast is normal? Specifically for birdsnest/digitata and misc acropora varieties...under let's say 2X250 10K MH and 4X54Watt T5 (2 10K and 2 03 actinic bulbs) in a 135 gallon tank (standard dimensions)? Water parameters are ideal. What kind of growth should one get in a certain timespan? If people could give me ideas, like pics/details of growth and how long, that'd be great!