frogspawn placement

[cityreefer]

i have a question about where to place my frogspawn coral i have had it for just about 2 years and it has grown great at the top if the tank from a small frag. now over the past 3 months i have seen its growth slow and the very top two branches do not have great polyp extension.

i have read on some care sites that this coral should be placed middle or low in the tank? some even say on the bottom.

what is every ones thoughts on this please. as i hate to move it and harm it.

my lighting is 2x55watt t5 power compacts 50/50 they are 6 months old.
i have them on for 12 hours a day.