Thank you for your support and kind words. It was too dark to find the crack last night so I will need to figure out where the crack is today to see if it is repairable.
Thank goodness I've asked for next week off.
I will need to work on the new pond FAST!!
Joyce - Thanks for the link.
I bought 2 sticks so hopefully they will arrive quickly.
Lining the tank - Didn't think about doing that until you mentioned it. Thanks for the suggestion. I may look into doing that if the Aqua-stick can't repair the crack. Will need to look into whether I have leftover liner from the new pond too. Then this can be my QT for new fish or sick fish. Worse come to worse, I will use it as a compost tank like Kay suggested.
As for splitting the fish - unfortunately I don't have any more spare tank for it.
But if the fishies are stressing out in the aquarium, I'll buy a new one.
Thanks everyone. I really needed the support. I'm just a worry wart by nature and DH thinks I'm over-reacting.
Kuan