Aquarium Leak

It is almost funny.  I was sitting watching TV an heard a little "Pop".  I assuned the cats had whapped a pen off a desk.

But when I went to feed the fish, I saw a small puddle of water; only a couple of spoonfuls.  Tracking it up from the base with a paper towel, I found the spot.  There was a tiny fracture in a corner.

This is going to sound weird.  To get at an old 20 gallon tank, I had to empty out an understairs closet I have not investigated in years.  It was so old, I found a manual typewriter and an old 8 track player in  there!

But the 20 gallon long was still waterproof, so I got the fish in there.  I will try to seal the 30 gallon high with the silicone sealant I bought today.  I'll give it 2 days to set, then add some water to see if the leak is fixed.