help crossbrace just broke
 

so im sittin in my room and hear a loud CRACK go look around and my crossbrace on 72 bowfront snapped by itself and is pulled away from back glass i am scared will my tank hold what should i do im freakin out. not leakin yet but omg.

How old? where did you get it? I, personally would be lowering the water level if possible. get a hold of manufacture. You might be able to drain, and silicone a "fishplate" over the crack.

bought used a year ago im trying to drain partially as i speak but some of my coral touch the surface of the water im about to break it off to try to submerge it i dont know how much water i can remove

Pictures? Plastic, acrylic, glass brace ?

standard oceanic glass bowfront with the plastic brace

ok i have clamped it and braced the back with a sheet of steel temp fix kinda ugly but my tank is in 1 piece so im not crying. some of my coral are very ****ed as i had to move rocks n drain alot of water to release pressure. i also shattered a bit of my green plating monti that i got from niloc.