Originally Posted by
indyws6
http:///forum/post/2622903
Greetings
Get a piece of 1/4" glass cut just tall and wide enough to completely cover the crack and provide a little (1/2") additional coverage. Thoroughly clean the outside of the tank and the new piece of glass and then silicone it over the top of the crack. Use enough silicone to provide complete coverage - you can clean off the excess with a razor blade once it cures. I realize that you can't get completely to the bottom because of the plastic trim. but if you force silicone between the trim and the glass tank when adding the new piece, and seal between the trim and the new piece, it should suffice.
It won't be pretty, but it might hold for you - and is a reasonably inexpensive thing to try.
Hope this helps - good luck!
+1^, but I would use two pieces of glass one on the inside and one on the outside. Have a friend who has been running his cracked sump like this for over a year now. Good luck
Only other option is to bust the original sump into pieces, remove it and replace it with a smaller sump.