ATM stands for Acrylic Tank Manufacturing.
Animal Planet’s "Tanked" is an aquarium reality TV show; they build some of the world's most imaginative, high-end and glamorous aquarium setups for celebrities, hotels and Fortune 500 businesses. They setup, create and install everything from the tank, the stand, all the woodwork, the facade, the pumps, the filters and the coral inserts.
Of interest, Toyota unveiled the latest SpongeBob edition Highlander at the 2013 SEMA show, which now features an 800-gallon fish tank behind the rear seats. It was built with the help of the folks at Animal Planet's "Tanked" and features a massive custom-built aquarium inside that stretches from behind the two front seats to the tailgate. Check out more at Motor Trend.