I was looking into them a while back and I searched on a dedicated saltwater forum and alot of people had problems with this exact unit. Some reported cases of fire as well. So imo i think it would be better to spend the extra cash on a better unit
My buddy uses this exact sytem on his 75 and grows just about everything just be careful on the placing of the items in your tank...Keep the things that require alot of lighting perched up top of your tank.