HI gonzo welcome to Fishlore

Leaking tanks is not a major problem depending on where its located. From what i understand, its at the top of the tank, is it right?
Well, if that's the case, you can lower the level of your water, wait a couple days for it to dry, and then use some Aquarium Silicone. Not sure of the brand, but some members have used some other type, i cant remember the name. So, if the leak is on the rim( the top) you just carefully add some sillicone to the underside of it to make it stick again.
However if it is on the side, You might have to drain the tank, scrape off any silicone on the particular side, and then silicone agian, wait 48hrs and then fill the tank. You have to be careful while removing the silicone since leftovers will weaken the new sillicone. There are some threads about resealing a tank. If you go to the top right hand corner of the page, there will be a search box. Type in:
AQUARIUM SILLICONE or something similar, and read through the threads that come up on the answer.
Hope i helped
tony
PS- Enjoy the site
