ok here's the thing, water and fish are in the tank.
sounds like bridging the gap would be the simple solution. Trick will be not letter the glue get into the water. I can drain most of the water and work on it.
I figured the center brace was important...I wasnt planning on removing that. I was thinking I could just cut the the back, left and front sides of the hole to make the hole bigger but also cut out the crack....but its sounds like that isnt a good choice.
According to the previous owner the damage was done about a year or 2 ago when they were moving. They drained all but about 3 inches of water and the movers went to pick it up by grabbing the top piece and it cracked (DUH). Oh well I got an awesome deal so a little repair work is no big deal.
So repair....what steps do I take?
1. drain most of water, leaving only enough for fish (or remove all water and put fish in buckets, not ideal)
2. clean underside of top piece, What should I use to clean it?
3. use weld on acrylic glue to place a bridge over crack as hoppy described. where do I get this weld-on acrylic glue?
4. wait 24 hours before refilling.