I have a stone/concrete water feature with a long crack in the base which makes it leak.  I have tried various things but none of them have worked. I have been told that I can cure this problem by coating the inside of the base and sides with epoxy resin. Would you please let me know if this is correct, and, if so, what do I need to do.

I'm so pleased with myself.  I managed to avoid all the 'crack' inuendo in that previous reply