So I just bought one of the Ai Prime Led for my 40gal cube and was wondering which way is the best to hold it? The flex arm, the tank mount or the hanging kit? I'm deciding between the tank mount and the hanging kit because I heard the flex arm doesn't stay tight and people have a lot of problems with it falling into their tank. The only reason I'm hesitant with the hanging kit is because I can't find a picture anywhere of what it looks like all set up! Does it come with everything I need to hang it? Does it hang from the ceiling or do I need to purchase anything else? If anyone has pictures, that would be great. I'm just not sure what the best option is.