firs i would find out why it cracked. maybe the new stand isn't level ?
if it was me ,i would put a piece of glass on the inside of the tank the
same size of the panel and silicone around it like if it was a new panel .
if it was me ,i would put a piece of glass on the inside of the tank the
same size of the panel and silicone around it like if it was a new panel .