I picked up a tank for free yesterday, it had a cracked front so i took the glass off by first removing only the front the plastic on top from one corner to the other. then i removed the glass with a razor. So what im left with is an open tank with a missing piece on the top where the glass was. If i didnt lose you yet... im wanting to put an acrylic front on with doors and maybe screen. this may be difficult as i didnt take the plastic frame off in one piece. also i really dont want this to leak so what can i do to ensure that the bottom seams are extra waterproof? I was thinking great stuffs pond sealant? this reall has to be sealed good Anyone have experience or any good links for this kind of stuff ? thanks