Thats cool i could see how it looks like a stupid idea, but if i where any closer i would just do it for you, dont worry about it. well i thought that the bottom picture would have shown that. and yes put it on the inside, like i said you will need a carbide tipped glass cutter. and to breake the braces a blowtoarch would work well and let me tell you why, when you score the glass the cut dosnt go all the way through, you only break the surface tention. using heat will cause a thermal shock, going from room tenperature to 500 degrees compleats the cut through the glass, i have used this method about 10-15 times and it works better then snapping it with plyers. i know that you said that you dont own one but its usefull.,
I dont know if this is the best method since the best method would be to replace the whole cracked sheet(but that would cost about $200). but what you need to do is see where the cracks are and remove the part that is cracked so it dosnt spread. and the best way to do this is to use the glass cutter and cut out a diagnal piese of the existing glassdiagnal because then there arn any points to spread and create new cracks... then from the inside mesure where to cut the brace and with a straight edge press down with the cutter hard and score the glass, but be carefull not to damage the bottom sheet(well more). then from the outside(the bottom ot the bottom) you can use a small hammer and a screwdriver to knock out the broken peices, and like i said try not to cause more damage with falling pieces. once its all cutaway, get a generiouse piece of new glass atlease 1/2 thick but 3/4 would be better, and apply a generous amount of sillicone to the bottom so it sticks to the existing piece. use the stuff that oozes out to do the corners.
i realy dont know any other way of explaining it so good luck. i realy only have experance repairing tanks under 100gallon and made from acryllic.
Just be happy the bottom isnt made of tempered glass...
