Hello,
Was the overall coral that light when you got it? It appears like it's lost much of its zooxanthellae. If it got lighter after you purchased it I would move it to an area of high flow and lower light.
it has actually gotten more colour it was very white, its is deffinatly getting colour, with hint of green. what do u suggest i do put in high flow area. is it stn though
Yes it looks like STN to me. Higher flow often stops it. Healthy Acropora do not often loose tissue under low light conditions but rather get very dark and often brown as they allow the zooxanthellae to increase. Low flow on the area sheltered areas will often be the cause of tissue die off.
Kevin gave some good advise and the insurance frag is something I also would recommend. Yes it has some stn but it doesn't look to serious yet, in my opinion.