I found a 3+ gallon plastic aquarium at Goodwill that looked in great shape so I decided to buy it to see how it would go. 3 bucks out of my pocket so I figured what the heck. Got home and started to clean it and found three hairline cracks close to the middle and bottom of the tank. This would be a great tank for my Female and, since I'm a poor college kid, I figure I should try and find a way to fix it.
Any way I could somehow seal them and make the aquarium usable? I know Silicone might work, but it's pretty expensive so I'm kind of looking for other options if that's possible.