Fantasea Aquariums are known for our custom aquarium designs within the Sydney to Newcastle region. We are passionate about sleek design and functional design to ensure your aquarium looks its best and is easy to maintain. We also offer a range of products and services for all of your aquarium and water feature needs. Contact us today. The Central Coast's Aquarium Specialists in Australia. Custom Tank Building & Installation. Residential & Commercial Services. Visit Our Showroom.