Aw I'm sorry. I'm glad to hear your solo went well though. I was in choir 7-12 grade.
A good place to look for fish tanks in my opinion is craigslist, or your local salvation army, places like that. I got my 1 gallon hospital tank for $2. Its one of the triangle ones with a lid, lights, underground filter(although they suck), and the tube thing for the aeration system. Also had a pack of light bulbs and a octopus cave decoration thing.