My parents bought me a 50 gallon tank and cabinet stand at an auction for $5. They are bringing it to me today. Woohoo! First I am filling it with water to see if it leaks. Then I need to clean it because it is aweful looking. I know I can't use soap or abrasive scrubbers. I don't think water will get off the dirtiness. Any suggestions? My mom said it is acrylic. Thanks!