k just got back from lowes with 2 36" bar clamps and a tube of silicon. glass is ok so it shouldn't be a big deal to reseal it just worried about the bio....
"Whisper i" filter would come in handy. They have suction cups on them and can be put low in the tank. It is a big tank, but a little bit is better than nothing.
dont just use the clamp ons. grab a couple 2x4's or two pieces of something like that ot clamp between the clamps and the tank. to spread out the pressure. If you do that and that clamps hold, you should be good.