Julian Sprung is a legend in the saltwater aquarium hobby, a true coral guru, he is well known in the hobby for his contributions and research. He is also an author, inventor, and public speaker. He's very knowledgable when it comes to the in depth care of corals, fish, and marine life as a whole. He also has multiple aquariums that he enjoys taking care of at his home. Julian gives Lou and the crew an exclusive inside look of his home aquariums, shares his secrets, and breaks down everything he does to ensure all of his saltwater animals are thriving.