I got a used 77 gallon tank tonight, and it leaks a bit on one of the seams about half way up. It will probably have to be resealed, any tips? I doubt there is anywhere around here to get it fixed, so it looks like it will have to be a DIY project.
Try Google - there is a lot of DIY aquarium information, and you should be able to find detailed, step-by-step information on how to repair it. One thing I do know is remove ALL the old silicone from the place you want to repair before you add new - silicone can't be used to 'patch' a leaky seal, you need to make a clean start.