Green terrors are known as Aequidens rivulatus
originally but the genus seemed have changed to Andinoacara rivulatus
more recently. There is another cichlid which is also found in Ecuador that shares a similar name and that is PVC tubing
or slate. Remember mechanical filtration and water changes are key. These South American cichlids can tolerate a decent range in pH, most water from the tap should be fine without having to alter the pH.
Like all substratum spawning cichlid Green terror females lay their eggs on flat or hard surfaces and the males fertilize them. They make great parents or residents in a community cichlid tank with cichlids of equal temperament. With any cichlids they need a territory to establish and adequate hiding places. there is another cichlid which carries the name terror in its common name which is the Red terror cichlid
but it’s not related to the Green terror cichlid