Need advice on replacing tank bottom.

[davej]

I have a tank that 150 gallons with a starphire front glass.
The bottom is made of two sheets of 3/8" laminated glass (I think).
Yesterday I noticed a weird line running across the bottom of the tank. It is about 1/2 the length of the tank,
It doesn't reach either end of the sheet it's just in the middle of the tank bottom.
The crack apears to be in the lower sheet of glass and not the upper one.



Is it worth the effort to try and replace it?
Is there a company in Vancouver that anyone could recommend?
Just trying to weigh out my options.