center brace

[rayyue]

i just break my centre brace last night
because i'm setting up my 120gal reef tank
my tank is 48x24x24 with 10"wide center brace
i put one 400w metal halide at the center on top of the center brace
after few hours, the glass was heat up by the bulb (i didn't know that)
and when i feed the fish, one drop of water drop on the center brace
because the center brace is so hot but the water is cold
the center brace "pop" and break
i pump out half of the water to prevent the tank break

today i phone to a guy he is a pro tank maker
and told him my story
he said my tank will bow but won't break
because my glass is half inch thick
it can handle it