Welcome to Abyss Aquariums / Custom Built Aquariums

We are Sydney's BIGGEST Custom Built Aquarium makers. We custom make the tanks that others say cant be done.

Whether you're after a new fish for your aquarium or after a complete Custom Built setup you have come to the right place.

Abyss aquariums and Custom Built Aquariums have some of the most knowledgeable staff in the aquarium trade you are guaranteed to get the right information the first time.

We always have a wide range of fish in stock including Discus, Tropical's, Marine, Native's, Goldfish , African and American Cichlids.

News & events

New Stock

Special Projects


We have moved into a new Shop. Now is the time to come and visit Abyss Aquariums and Custom Built Aquariums for your new Custom Built Aquarium. We Can now be found at 2/21 Rodeo Road Gregory Hills

We will post up some new photos of the marine fish when they have settled into the store.