I've got an Acei and two Hongi cichlids in my tank and all of them seem to be a very very dark blue. Their brethren at the pet store seem to be a much lighter blue. The acei has been there for at least six months so I don't think it is from adjusting to a new enviroment. Any ideas why they might not be showing their color, or do I need to change my lighting. Right now it's just a basic flourescent.