My Mom has an old Kritter Keeper that she's had for..say, 20 years, since she had her Chinchilla. She would put him in it while she cleaned his cage. Fast forward to a few years ago, my uncle found a water snake (or two) and put them in it. Kept them in it over the summer and then let them go. Dumped it out, fast forward another year, and he put another snake in it for a day or two, then let it go. I'd like to use this as a fish tank. Is this possible? or is it far too dirty? It looks clean, just a couple scratches here and there. Can I properly sanitize it with vinegar? If not, how? I measured how much water, and it's approximately 3 gallons. Will it break from the pressure of the water? I'm soo worried about something happening and it somehow cracking.