Papareef- did you get a 4 bulb tek or 6?
I have an 8 bulb fixture

it covered the complete top of the 75,and i know it was overkill.It was bought used, 2 months old,but for 275 shipped,i couldn't pass it up..god bless RC.I now have a 100 gallon and couldn't be happier with them.just have to watch the sofies are far enough down.