it is about 5-6" now...and thanx...this is the first severum that i ever really paid attention to...and i bought it...every fish that i look at for more the 5min i end up getting lol....i'm an addict ...i hear the first step is acception to the fact...but i don't see the light as i just looked at glass for my new tank build 10'x6'x2.5'