You understand the glass will also require a coating of PDMS or similar material, right?
Also, the Form printing process involves over-compression of the first few layers, the build platform is driven a little bit past the point of contact with the bottom of the tank. Plastic flexes but if you’re not careful, a glass bottom might crack. Especially Boro which tends to be more brittle in my experience.
There is someone selling remanufactured resin tanks with glass bottoms, though, so it is definitely doable…